& amp#39; Biceps brachii'; It means "two heads"
The position of the humerus); At the elbow where the tail is bent.
There will be a muscle protrusion on the upper arm, commonly known as' mouse'
This is the biceps; When you bend your elbow,
Meanwhile, when the front arm is close to the elbow,
Both fight at the same time.
Biceps will be more obvious. Biceps really has two origins.
Are two tendons connected to the bone.
Connected to: (1) coracoid process (coracoid process
Find out the most prominent part of the clavicle first.
Then press down until you feel the scapula. This' head' is shorter.
Therefore, it is called' short head' (2)' supraglenoid tubercle of scapula. The supraglenoid tubercle refers to the pointed bone above the clavicle of the glenoid (the tubercle refers to the' pointed position'), and the glenoid is an integral part of the shoulder joint.
That is, the' nest' in ball-and-socket joint. Because there are two heads.
So it is also called' biceps'. Biceps has other physiological structures: insertion: radial tuberosity.
Radial function: mainly: elbow contraction.
Elbow flexion), shoulder contraction.
The whole arm is forward)
Supplement: supination) innervation: musculocutaneous nerve (musculocutaneous nerve)
C5~C7
That is to say, it consists of the fifth to seventh nerves from the cervical nerve tissue of the cervical plexus. ) The biceps brachii is the biceps brachii because it is connected with the scapula.
Humerus and radius
Through the shoulder and elbow at the same time.
So you can do the above actions. Its other function is to assist forearm muscles to make' palm valgus' action, but mainly to control forearm flexion.
So it is also called' forearm flexor'. The biceps brachii connects the [[scapula]] and [[radius]] of the forearm. The biceps brachii contracts and bends the forearm, or flexes. Its English name is "biceps brachii", which means "two heads of the arm", because the muscle near [[body]] is divided into two parts. [[Bodybuilder]] When showing muscles, the biceps brachii is often flexed because it bulges obviously when contracting.
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Why can physical activity make muscles develop? It is an indisputable fact that physical exercise and activities will develop muscles. The muscles of the gymnast's upper limbs, chest and back, and the muscles of the runner's legs are all very strong, so you can see the obvious outline of the wheel without forced contraction. So, why can physical activity make muscles bigger? When the human body is in a calm state, the blood circulating around the body accounts for 55%-75% of the total blood volume, and the rest is stored in the liver, viscera and other organs of the human blood bank. Most of the capillaries in muscles (thousands per square millimeter) are closed. During physical exercise, due to the strengthening of muscle activity, a lot of energy needs to be consumed. In order to meet the needs of muscle activity, at this time, under the flick of the fingers of the brain, the blood in the blood bank will flow into the blood vessels and increase the circulating blood volume of the whole body; The heart beats faster, the contractility is enhanced, and a large number of capillaries in muscles are opened (20-50 times more than when they are at rest), which accelerates the blood circulation of the whole body and increases the blood volume flowing through muscle tissues. In this way, a new generation of muscles and meat benefit from the strengthening process and get richer nutrition. After continuous forging, the egg white content in muscle meat will increase, the dimension of muscle fiber will increase, the connective tissue between muscle meat will increase, the number of hair capillaries in muscle meat will increase, and the volume and weight of the whole muscle meat will increase. A person's muscles only account for 4 0% of his body weight, while an operator with systematic training can reach 45-50% of his body weight. However, exercise thickening muscle fibers is only one factor. Because the increase of egg white in muscle contraction increases the material storage, muscle contraction is more flexible, so exercise is faster, more powerful and more lasting.
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