1. At present, there are about1.50,000 known species of animals. These animals can be divided into two categories: one is vertebrates, which have thorns in their bodies; The other is invertebrate, which has no spine in its body.
2. Biodiversity: 1, species diversity; 2. Diversity of living environment; 3, 00 the diversity of sports modes.
3. The reason why fish can survive in water is that two characteristics are very important: (1) it can get food by swimming and defend against enemies; (2) can breathe in water.
4. The structure that fish can overcome resistance in water: streamlined (spindle-shaped) body; The body surface secretes mucus.
When a fish swims, it relies on the left and right swinging of its tail on its trunk to generate the power to move forward. It relies on dorsal fin, pectoral fin, ventral fin and gluteal fin to keep balance, and caudal fin to keep the direction of progress.
6. When it is difficult to do experiments directly with the research object, sometimes experiments are done with the model, that is, imitating the experimental object to do the model, or imitating some conditions of the experiment. Such an experiment is called a simulation experiment.
7. Various fins play an auxiliary and coordinating role in sports.
8. Gills are the respiratory organs of fish.
9. There are abundant capillaries on the gills, so the gills are bright red.
10, gill filaments are many and thin, which is beneficial to full gas exchange in order to expand the contact area with water. Gills do not easily absorb oxygen in the air. After the fish left the water, the gill filaments covered each other, which reduced the contact area with the air and could not get enough oxygen from the air, so they died of lack of oxygen.
1 1, fish gills are very important for breathing in water: gills are bright red and contain rich capillaries; Branchial filaments are many and thin.
12. Water flows in from the fish mouth and out from the rear edge of gill cover.
13. In the water flowing from fish gills, oxygen decreases and carbon dioxide increases.
14, O2-in gas exchange water-in the capillary of gill filament.
Carbon dioxide in gill filament water
15, the main characteristics of fish: there are often scales on the body surface, breathing through gills, swimming through the swing of tail and the coordination of fins.
16, mouth without anus, food enters the digestive cavity through the mouth, and the digested food residue is still excreted through the mouth. These animals are called coelenterates.
17. Animals with soft bodies and shells are called mollusks.
18. Animals with hard armor are called crustaceans. Crustaceans breathe through gills.
19, coelenterates, mollusks and crustaceans are invertebrates.
20. All kinds of creatures in water are an important part of aquatic ecosystem. They form a close and complicated connection through food chain and food web, and at the same time, they are all influenced by aquatic environment. The change of their species and the increase or decrease of their quantity will affect human life.
2 1. Compared with the water environment, the land environment is much more complicated. (1) is relatively dry; (2) The temperature difference between day and night is large; (3) Insufficient buoyancy in water; (4) gaseous oxygen; (5) The land environment is complex and changeable.
22. Adaptation of animals living on land to environment: 1. Generally, there is a structure to prevent water loss; 2. Not affected by the buoyancy of water, there are generally organs that support the body and exercise. Used for crawling, walking, jumping, running, crawling and other sports modes to eat and avoid the enemy; 2. Generally, various respiratory organs are located inside the body and can breathe air, such as trachea and lungs; 4. Generally, there are developed sensory organs and nervous system, which can respond to the changing environment in time.
Annelids are not mollusks, annelids are invertebrates.
24. Animals whose bodies are composed of many similar annular segments are called annelids.
25. Earthworms live in humid soil rich in humus, because they are cold-blooded animals with little temperature change and are suitable for earthworms to live.
26, body segmentation can make the earthworm's body movement flexible.
27. Earthworms rely on muscle contraction and relaxation, bristle support and fixed movement.
28. Earthworms have no special respiratory system. Earthworms' breathing depends on the body wall that can secrete mucus and keep it moist all the time. The earthworm's body wall is densely covered with capillaries, and the oxygen in the air first dissolves in the mucus on the body surface, then penetrates into the body wall and then enters the capillaries on the body wall. Carbon dioxide in the body is also discharged from the body surface through capillaries in the body wall.
29. Earthworms can't keep a constant body temperature and can only live in deep soil with little temperature change.
30. Compared with warm-blooded animals, warm-blooded animals are more adaptable to the environment and are conducive to normal metabolism.
3 1, the rabbit's body temperature is constant, not only by the hair on the body surface, but also by the developed nervous system, circulatory system and respiratory system.
32. Rabbits have long hind limbs, short forelimbs and muscular hind limbs, which are suitable for jumping.
33, front teeth-cut off the canine teeth of food-tear the molars of food-grind food.
34. The structure and position of rabbit's heart and lungs are similar to that of human body, which shows that human and rabbit are very close in classification and belong to mammals.
35. Eat plants (such as rabbits)
Carnivorous (as a wolf)
Omnivorous (as humans)
36. The cecum is mainly used to digest fiber, and the cecum of herbivores is developed.
37. Rabbit's teeth are divided into incisors and molars. Incisors are suitable for cutting plant fibers, and molars are suitable for grinding food. Rabbits have developed cecum in their digestive tract, which is in line with their habit of eating plants.
38. Rabbits have developed brains, nerves all over the body and developed limbs. They can sensitively perceive changes in the external environment and react quickly.
39. Mammals are the tallest animals, especially vertebrates. There are many kinds, about 4000 on the earth. Except for a few species, they all have the characteristics of body surface coat, viviparous and lactation. Other features: four cavities in the heart, breathing with lungs, constant body temperature, belonging to warm-blooded animals, with incisors, canines and molars.
There are more than 9000 kinds of birds in the world.
4 1, the shape of the bird is streamlined, which reduces the air resistance during flight.
42. Birds' feathers are divided into normal feathers and down feathers (with warm-keeping function). Normal feathers have quills and fan-shaped wings, which can increase the contact area with air and facilitate flight by flapping the air.
43. Birds' pectoral muscles are developed and attached to the keel process, which is conducive to flying in the air.
44. This bird's skeleton is hollow, light and strong, with a prominent sternum and a keel structure, which is convenient for developed pectoral muscles to attach to the sternum (keel), reducing weight and facilitating flight.
45. Digestive characteristics of birds: 1, large appetite and strong digestive ability, which can meet the digestion of energy during flight; 2. Feces are not stored, which reduces the weight and is beneficial to flying; 3. Short rectum and frequent defecation.
46. Birds have developed hearts and strong working ability, and their blood has strong ability to transport oxygen, which is conducive to flight.
47. Birds have developed airbags (not respiratory organs) to assist lung breathing and meet the demand for oxygen during flight.
48. The whole body of a bird is designed for flight.
49. Mammals in warm-blooded animals
bird
50. Birds are covered with feathers, and their forelimbs become wings, so they have the ability to fly quickly. There is an air bag in the body to assist lung breathing, and the body temperature is high and constant.
5 1. Insects are the most diverse animals, with more than 1 10,000 known species (accounting for 4/5 of the animal species). Insects have three pairs of feet and can crawl. Some insects' feet are specialized into jumping feet, which can jump; Most insects have wings and can fly. Insects are the only flying animals among invertebrates.
The wings of insects are different from those of birds in structure, but as far as flying is concerned, they all have these similarities: they are all fan-shaped structures conducive to flying. The operation of these structures is caused by the contraction and relaxation of muscles, which can produce upward lift and forward power in the air. Compared with their bodies, they are light and big, which is conducive to flying in the air.
53. The significance of wings to the life and distribution of insects: it is beneficial to feed, avoid enemies, expand activities and distribution, and find places suitable for mating and spawning.
54. External characteristics of insects: the body of insects is divided into three parts: head, chest and abdomen, and the moving organs-wings and feet are born in the chest. There are well-developed muscles in the chest, which are attached to the exoskeleton, which is a tough shell covering the surface of insects (molting will occur), protecting and supporting the soft organs inside and preventing water evaporation in the body.
55. Insects are classified as arthropods. Besides insects, arthropods include spiders, centipedes, shrimps, crabs and so on. Their similarities are: their bodies are composed of many segments; There is an exoskeleton on the body surface; The foot and antenna are segmented.
56. Larvae live in water, breathe through gills, undergo metamorphosis, then live an amphibious life, breathe through lungs and breathe through skin. This animal is called amphibian.
57. The behavior of animals depends on a certain body structure.
58. The exercise system of mammals consists of bones and muscles (bones, skeletal muscles (exercise muscles) and interosseous joints).
59. The exercise system consists of bones, skeletal muscles and skeletal connections (such as joints).
60, people have 206 bones skull, sternum, ribs (can't move).
Trunk bone (semi-active)
Movable joints (joints) of limbs.
6 1, people have 26 vertebrae (semi-mobile bone connection)
62. Joint structure: joint head, joint capsule, joint cavity (with synovial fluid to make joint activities flexible), joint fossa, and joint cartilage (cushioning effect).
joint capsule
Articular head
articular cavity
cartilago articularis
sucking disc
63. Joints act as fulcrums in motion and are the points around which bones rotate.
64. The main joints of human body: upper limb shoulder joint and lower limb hip joint.
Elbow and knee joint
Wrist and ankle joints
Finger joints and toe joints
65. All vertebrates have joints.
66. When exercising, the elbow joint, hip joint, knee joint and ankle joint are easily injured.
67. How to protect joints during exercise: First, make full preparations for exercise before exercise; Second, the intensity of exercise should be appropriate; Third, wear wrist pads and knee pads.
68. The thicker part of skeletal muscle (organ) is called muscle abdomen, and the thinner milky white part at both ends is called tendon.
69. Skeletal muscle has the characteristic of stimulated contraction.
70. Why does skeletal muscle affect bones: When skeletal muscle is stimulated and contracted by nerves, it will affect the movement of bones around joints, so the body will exercise.
7 1, the muscles connected with bones are always coordinated by two groups of muscles.
72. There are more than 600 skeletal muscles in the whole body. When the arm droops naturally, both biceps brachii and triceps brachii relax.
73, elbow flexion, biceps contraction, triceps relaxation; When the elbow is extended, triceps brachii contracts and biceps brachii relaxes.
74. Of course, exercise is not completed only by the exercise system, it needs the control and adjustment of the nervous system and the supply of energy, so it also needs the cooperation of the digestive system, respiratory system and circulatory system.
75. Summarize the role of bones, joints and muscles in exercise in one sentence: skeletal muscle contraction affects the movement of bones around joints, so the body moves.
76. Animals have various behaviors. From the way of acquiring behavior, animal behavior can be roughly divided into two categories. One is the innate behavior of animals, which is determined by the genetic material in animals, which is called congenital behavior; The other is the behavior obtained from life experience and learning through the role of environmental factors on the basis of genetic factors, which is called learning behavior.
77. Many behaviors are the result of the combination of innate behavior and learning behavior, such as bird migration.
78. Innate behavior is the most basic condition for animal survival. Learning behavior enables animals to adapt to the changing environment and survive better.
79. The higher an animal is, the stronger its learning ability and the more it can adapt to the complex environment. Similarly, the more complex the environment, the more behaviors you need to learn.
80. Congenital behavior has great limitations. If a creature has only innate behavior but no learning behavior, then it will be eliminated naturally.
8 1, for a person, skill training and knowledge learning are adapted to the development stage of the brain, and it is difficult to make up once the critical period of learning is missed.
82. Social behavior characteristics: 1. Some organizations often form within groups; 2. Clear division of labor among members; 3. Grades have also been formed in some groups.
83. Groups are arranged in a hierarchical system according to their size, strength, health and ferocity.
84. The "leader" enjoys food and spouse first, and chooses the nesting site first. Other members will obey it, dare not fight back against its attacks, and be responsible for directing the actions of the whole community.
85. Animals' movements, sounds and smells can all play the role of transmitting information.
86. The significance of social behavior to animal survival: It is often easier to get food and overcome the invasion of natural enemies by relying on the strength of groups, which can effectively ensure the reproduction of species, make groups better adapt to the environment and maintain the lives of individuals and races.
87. In nature, information exchange between living things is ubiquitous (people talk, animals talk). It is precisely because of the existence of material flow, energy flow and information flow that the relationship between organisms is complicated, and "one hair pulls one hair and moves the whole body", and organisms and the environment become a unified whole.
88. There are interdependent and mutually restrictive relationships between the food chain and various organisms in the food web. In the ecosystem, the number and proportion of all kinds of organisms are always maintained in a relatively stable state, which is called ecological balance.
The role of animals in nature: 1. Animals play an important role in maintaining ecological balance; 2. Animals can promote the material circulation of the ecosystem; 3. Help plants pollinate and spread seeds; 4. Biological control.
90. Biological control refers to the use of organisms to control pests and diseases. In addition to insect control, there are birds and bacteria.
9 1, the role of animals in people's lives: rich in nutrition and available for people to eat; Play a role in medical care; In appreciation and entertainment, literature and art have a certain image; People use it to describe some images or certain characteristics in life; Animals spread some diseases (injuries) to humans.
92. In the ecosystem, the number and proportion of all kinds of organisms are always kept in a relatively stable state.
Now scientists are studying the use of living things (such as animals) as "production workshops" to produce certain substances needed by human beings. This is a bioreactor.
94. Advantages of bioreactor: It can save the cost of building a factory building and purchasing instruments and equipment, and reduce complicated production procedures and environmental pollution.
95. Scientists invent and create various instruments and equipment by carefully observing and studying living things and imitating some structures and functions of living things. This is bionic.
96. A colony is an aggregate of bacteria or fungi that can be seen by the naked eye after reproduction.
97. Bacterial colonies are relatively small, the surface is smooth and sticky, or the fungal colonies that are rough and dry are generally several times to dozens of times larger than bacterial colonies. The colonies formed by molds are often fluffy, flocculent or cobweb-like, and sometimes they can be red, brown, green and black.
98. Bacteria and fungi, as well as their different species, can be roughly distinguished from the morphology, size and color of colonies.
99. Colonies are often used as an important basis for strain identification.
100. General methods for culturing bacteria or fungi: ① Preparation of nutrient medium containing nutrients. ② The culture medium was sterilized at high temperature and cooled. ③ Put a small amount of bacteria or fungi on the culture medium (this process is called inoculation). ④ Petri dishes are cultured in a constant temperature incubator (or a warm place indoors).
10 1. Bacteria and fungi are widely distributed in the biosphere.
102. Bacteria and fungi also need certain conditions to survive. If you need moisture, suitable temperature, certain living space, organic matter.
103. It is impossible to have bacteria and fungi in a strict high-temperature mold environment.
104. Lactic acid bacteria can decompose organic matter into lactic acid only under anaerobic conditions.
105. All bacteria are unicellular organisms.
106. Some bacteria are interconnected in clusters or long chains, but each bacteria also lives independently.
107. Cell structure diagram:
108. Nutritional models are divided into autotrophic model and heterotrophic model. Both bacteria and fungi are heterotrophic models, which can be divided into saprophytic model and parasitic model.
109. In the later stage of growth and development, some bacteria contract, the cell wall thickens and forms spores. Spore is a dormant body of bacteria and has strong resistance to adverse environment. Small and light can also be scattered around with the wind, fall in the right environment, and germinate into bacteria. Bacteria are ubiquitous because of their rapid propagation and spore formation. (Bacteria divide very quickly)
1 10. Yeast is a unicellular fungus. Mould, edible fungi and macrofungi are all multicellular fungi.
1 1 1.
1 12. There is no chloroplast in the cells of fungi, and spores can reproduce.
1 13. The yeast is sprouting.
1 14. Penicillium: The spores are turquoise and arranged in a broom shape. The nutritional mode is heterotrophic.
1 15. Aspergillus: The spores are of various colors and arranged radially. The nutritional mode is heterotrophic.
1 16. The fungus that causes food mildew is mold.
Bacterial fungi
mutually
the same
Point cells have no chloroplasts and use ready-made organic matter (heterotrophy).
no
the same
Point single cell, no nucleus, division and reproduction. There are both unicellular species and multicellular species, and there are real nuclei in cells, most of which are spore reproduction.
1 17. Comparing fungi and bacteria:
1 18. the role of bacteria and fungi in nature: (1) participate in the material cycle; (2) Causing animal and plant diseases; (3) Causing animal diseases.
Most bacteria and fungi are decomposers in the ecosystem.
120. In the material cycle of nature, bacteria and fungi decompose the remains of animals and plants into carbon dioxide, water and inorganic salts, which can be absorbed and utilized by plants to make organic matter. It can be seen that bacteria and fungi play an important role in the circulation of carbon dioxide and other substances in nature.
12 1. Some kinds of bacteria and fungi live parasitically. They absorb nutrients from living animals, plants and people, causing different diseases among animals, plants and people.
122.*** Living together is interdependent and mutually beneficial. Once separated, neither of them can live independently. This phenomenon is called * * *. (once separated, you can live independently, called * * * habitat)
123. Parasitic (often harmful); * * * Health (mutual benefit).
124. Yeast fermentation state:
Organic yeast carbon dioxide+water+energy (more) [mostly used to make bread]
Organic yeast carbon dioxide+alcohol+water+energy (less) [used for brewing]
125. Fermentation: anaerobic respiration of microorganisms (also known as respiration)
126. Food spoilage is mainly caused by bacteria and fungi. These bacteria and fungi can get organic matter from food, and grow and reproduce in food, leading to food decay. Therefore, an important problem of food preservation is preservation. The main principle of preventing food spoilage is to kill or inhibit the growth and reproduction of new army and fungi in food.
127. Some fungi can produce substances that kill some pathogenic bacteria. These substances are called antibiotics.
128. Scientists can also use modern technology to transfer some genes from other organisms to some bacteria, and only these bacteria can produce drugs (using bacteria as bioreactors).
129. 1928, British bacteriologist Fleming invented antibiotics.
130. Significance of biological classification: Understand and protect biodiversity, make the position of each species in biological classification clear at a glance, and further clarify the genetic relationship between organisms.
13 1. Biological classification mainly classifies organisms into species, genera and other levels according to their similarity (morphological structure, internal structure and physiological function). The basic unit of classification is species.
132. In angiosperms, flowers, fruits and seeds are often used as important basis for classification.
133. Each boundary is divided into six smaller grades, which are: boundary, phylum, class, order, family, genus and species.
134. The more taxonomic units between two organisms, the closer their genetic relationship.
135. Overview
136. The higher the classification and registration, the greater the difference between the internal bodies of Belamcanda belamcanda chinensis, the fewer the same features and the more organisms it contains.
137. The internal form of biodiversity is the diversity of genes, and the external form is the diversity of species.
138. China is the country with the richest gymnosperms, which is called "the hometown of gymnosperms".
139. All kinds of biological characteristics are controlled by genes.
140. The destruction of polycentric ecosystem will lead to the loss of biodiversity and gene diversity.
14 1. Under natural conditions, a bird became extinct in 2000 on average. On average, one mammal goes extinct every 8000 years.
142. The threat to biodiversity is caused by the change and destruction of (1) living environment; (2) Predatory exploitation and utilization; (3) environmental pollution; (4) Biological invasion.
143. In order to protect biodiversity, relevant laws include environmental protection law, marine environmental protection law, forest law, grassland law, fishery law, wildlife protection law, water and soil protection law, etc. (Add "People's Republic of China (PRC)" before each law)
144. The establishment of nature reserves is divided into in-situ protection and enclosure protection.
145. Forests are home to 50%~90% of terrestrial life in the world.
Davidia involucrata is an angiosperm. Silver cedar is a gymnosperm.
Review materials of eighth grade biology (part two)
Unit 7 Chapter 1 Biological Reproduction and Development
I. Plant reproduction
1. Sexual reproduction: a reproductive mode in which fertilized eggs develop into new individuals. For example, seed propagation (reproduction of offspring from seeds in fruits through flowering, pollination and fruiting). ) (Egg cells in ovules combine with sperm in pollen to form fertilized eggs → embryos → seeds)
2. Asexual reproduction: Without the combination of hermaphroditic germ cells, new individuals are directly produced by the mother. Such as cutting, grafting, layering and tissue culture.
3. The key of grafting: the scion is closely combined with the cambium of the rootstock to ensure survival.
Reproduction and development of insects
1. Complete metamorphosis: In the process of developing from fertilized eggs into new individuals, the structure and living habits of larvae and adults are very different, and this development process is called metamorphosis. Eggs → larvae → pupae → adults. For example: silkworms, bees, butterflies, moths, flies and mosquitoes.
2. Incomplete metamorphosis: egg → nymph → adult. Examples: locust, cicada, cricket, mole cricket, mantis.
Reproduction and development of amphibians
1. Abnormal development: egg → tadpole → young frog → adult frog.
2. Features: Oviposition, in vitro fertilization.
Four. Breeding and development of birds
1. process: nesting, courtship, mating, spawning, hatching and brooding.
2. Features: Oviposition and fertilization
3. Structure of bird eggs: yolk is an egg cell. The blastoderm contains the nucleus. Eggshell and shell membrane-protection, egg white-nutrition and protection, egg yolk-nutrition. The blastoderm is where the embryo develops.
Chapter II Inheritance and Variation of Organisms
Heredity: refers to the similarity between parents and children.
Variation: refers to the difference between offspring and parents.
First, genes control biological characteristics.
1 Biological characteristics: biological morphological and structural characteristics, physiological characteristics and behavior patterns.
2 Relative traits: different manifestations of the same trait of the same organism.
3. Genes control biological characteristics. For example: transgenic super mice and mice.
Organisms inherit genes rather than traits.
Second, gene transfer between parents and children.
1. gene: DNA fragment on chromosome that controls biological characteristics.
2.DNA: It is the main genetic material of double helix structure.
3. Chromosome: A substance in the nucleus that can be dyed dark by alkaline dyes.
4. Genes are transmitted through sperm or egg cells. Sperm and egg cells are the "bridge" of gene transmission between parents and children.
The morphology and number of chromosomes in each biological cell are determined.
Chromosomes exist in pairs in biological cells, and genes also exist in pairs, which are located on paired chromosomes respectively.
In cell division that forms sperm or egg cells, chromosomes are reduced by half.
Dominance and Recessiveness of Three Genes
1. Relative traits include dominant traits and recessive traits. The first generation hybrids are dominant.
2. recessive trait genome becomes: dd dominant trait genome is called Dd or DD.
China's marriage law stipulates that marriage is prohibited between lineal blood relatives and collateral blood relatives within three generations.
4. If a family once had genetic diseases or carried pathogenic genes, its descendants are more likely to carry pathogenic genes. If the related offspring remarry and have children, the chances of suffering from this disease will increase.
Aa A a
Ah ah ah ah
AA Aa Aa aa
Sex inheritance of four people
1. There are 23 pairs of chromosomes in each normal person's somatic cell. (Male: 44+XY Female: 44+XX)
2. Among them, 22 pairs are identical to men and women, which are called autosomes, and 1 pairs are different from men and women, which are called sex chromosomes. The male is XY and the female is XX.
3. Equal opportunities for boys and girls, 1: 1.
Five-level mutant organism
1. The variation of biological characters is common. Variation is first determined by the difference of genetic material basis, and then it is related to the environment. So there are genetic variation and non-genetic variation.
2. Examples of human applying the principle of genetic variation to cultivate new varieties: artificial selection, cross breeding and space breeding (gene mutation).
Chapter III Biological Evolution
First of all, the origin of life on earth
1. Most scholars believe that the process from inorganic substances in the primitive atmosphere to organic substances and then to primitive life was carried out on the primitive earth.
2. Primitive earth conditions: high temperature, high pressure, ultraviolet rays, thunder and lightning, primitive ocean and lack of oxygen.
3. protein, nucleic acid is an important substance in life
Second, the course of biological evolution.
1. comparison method: according to certain standards, compare interrelated things to determine their similarities and differences.
2. Fossils: the remains, relics or traces of life of organisms buried in the stratum for various reasons and formed after tens of thousands of years of complex changes. For example: archaeopteryx fossils (ancient reptiles → ancient birds)
3. The general trend of biological evolution: simple to complex, low to advanced, aquatic to terrestrial.
Third, the reasons for biological evolution
1. Simulate the formation process of protective color: one aspect of animals' adaptation to the environment is the result of natural selection.
2. Natural selection: after living competition, the fittest survive and the unsuitable are eliminated.
3. Process: excessive reproduction, survival competition, genetic variation, survival of the fittest.
4. Significance: Organisms constantly evolve through heredity, variation and natural selection.
Unit 8 Chapter 1 Infectious Diseases and Immunity
I. Infectious diseases and their prevention
1. pathogen: bacteria, viruses, parasites and other organisms that cause infectious diseases.
2. The basic link of the epidemic of infectious diseases: susceptible people pass through the source of infection.
3. Preventive measures for infectious diseases: control the source of infection, cut off the route of transmission, and protect susceptible people.
Immunization and planned immunization
1. Three lines of defense of human body:
The first line: skin and mucous membrane
The second way: bactericidal substances and phagocytes in body fluids.
The third way: immune organs and immune cells.
2. Antibodies: When pathogens invade the human body and stimulate lymphocytes, lymphocytes will produce a special protein for pathogens.
3. Antigen: a substance (such as a pathogen) that causes the human body to produce antibodies.
4. Immunity: Initially refers to the human body's resistance to pathogens.
Now it refers to a physiological function of the human body, which enables the human body to identify its own and non-self components, thus destroying and rejecting the antigenic substances of the human body, or the damaged cells and tumor cells produced by the human body itself, so as to maintain human health.
Vaccine: a biological product usually made of inactivated or attenuated pathogens, which can produce corresponding antibodies after being inoculated into human body.
6. Planned immunization, meaning:
Chapter II Drugs and First Aid
Safe use of prescription drugs (R) and over-the-counter drugs (OTC)
1. Names and functions of some commonly used drugs. For example, Niuhuang Jiedu tablets can be used to treat diseases such as sore throat. The new quick-acting cold tablets can be used to treat nasal congestion, sore throat, headache and fever caused by colds.
2. Summarize the common sense of safe medication. -Analysis of information contained in drug labels. Main ingredients, indications, usage and dosage, drug specifications, precautions, production date and expiration date of the drug.
4. 120 first aid
5. artificial respiration
6. Chest compressions
7. Bleeding and hemostasis: external bleeding, internal bleeding, capillary bleeding, venous bleeding and arterial bleeding.
Chapter III Self-awareness and Health Improvement
First, assess your health.
1. Health refers to a good state of physical, psychological and social adaptation.
2。 Keep a happy mood: Happiness is the core of adolescent mental health.
Second, adjust your emotions.
Methods: divert attention; Choose the right way to vent your troubles; self-consolation
Second, choose a healthy lifestyle.
1. Influence of lifestyle on health: Chronic non-communicable diseases are not only affected by genetic factors and environment, but also related to personal lifestyle. Unhealthy lifestyle accelerates the occurrence and development of these diseases.
2. To explore the effect of alcohol or tobacco extract on the heart rate of Daphnia. 25%) can promote the heart rate of Daphnia, and high concentration of alcohol can inhibit the heart rate of Daphnia.
3. Harm of alcoholism to human health: Alcohol will damage people's heart and blood vessels, and alcoholism will make the brain excessively excited or paralyzed, leading to neurasthenia and mental decline. Long-term alcoholism can lead to alcoholism, excessive drinking and life-threatening.
4. Harm of smoking to human health: When tobacco burns, harmful substances such as nicotine and tar in the smoke enter the human body, causing damage to the human nervous system, reducing people's memory and attention, and also inducing various respiratory diseases, such as chronic bronchitis and lung cancer.
5. Harm of drugs: it will damage people's nervous system, reduce human immune function, cause cardiopulmonary injury, respiratory paralysis and even death.