Human life is magical, which is a great creation of nature. And our journey of exploration this time is from the formation of life, to the birth of a life, and then to the birth of the last life.
First of all, the formation of a life begins with the meeting of sperm and eggs. Generally, at a certain time, men will produce 250 million sperm, and then they will come to women's bodies through sex, but few of them can really succeed. First of all, women's uterus is usually blocked by a kind of mucus, but at a certain time, this uterus will soften and form a chemical path. Only in this way can sperm come over and enter the uterus. First of all, the first hurdle is that sperm should climb the road to the uterus. Through this road, it needs strong vitality, not abnormal sperm. A lot of sperm will be eliminated here alone Second, because sperm does not belong to the female body, the female body will automatically regard it as an intruder, and white blood cells in the female body will attack sperm, where many sperm will be attacked and decomposed. Only 20 people who really survive will enter the fallopian tube. The tube wall of fallopian tube will induce sperm to stick to the tube wall and make them temporarily dormant. The organ that holds and wraps eggs is a very clever organ. In fact, before everyone is born, the number of their eggs has been determined. It is a number that has been determined in the mother's womb. This organ wrapped with eggs will expel a mature egg at a certain time. This egg will pass through the fallopian tube, send out a seductive signal, and wake up those sleeping sperm. These sperm will start a race. Whoever runs fast will come to Ruanzi first, push away the cloud cells on the surface of the egg and enter the membrane to successfully combine with the egg. But at this time, only one sperm cell can combine with the egg. When combining, the egg will instantly expel substances that can harden the whole egg and prevent other sperm cells from entering, otherwise the egg cell will die. When the egg and sperm are successfully combined, the cells in the egg begin to divide, from one to two, then from two to four, and then from four to six. This is the cell differentiation that we have learned before. When they want to differentiate into different cells, they develop their own functions. However, the development process is not always so smooth. If the development process is not smooth, the egg cell may die or fail. Within two hours after division, a fertilized egg cell can divide into two fertilized egg cells, which is what we call twins. They will be divided into two fertilized eggs with almost the same genes, but sometimes the division is not so smooth. After two hours, the fertilized egg has been shaped and can no longer divide. But if the fertilized egg splits in half and stops splitting, conjoined twins will be formed. In fact, there are such examples, and their lives are very inconvenient. Maybe that's it. Sometimes, our mother may be pregnant with a child who is not twins or triplets, but looks different, but is also in the belly, so this may be because a large number of eggs are excreted, such as two or three, and they are all combined with sperm, so this will happen.
And after talking about the combination process of sperm and eggs, how is the human face formed? In fact, when I watch a documentary, I feel like squeezing plasticine. A person's face is composed of three parts, and then slowly squeezed together to form a person's face, which is very magical. However, there are also times when the formation is incorrect. For example, the upper part of the upper lip is not completely combined with other parts, resulting in cleft lip. Although this disease is not a big problem, it will also affect some normal functions of people. This may also be the wrong choice made by nature at random.
Although everyone around you is normal, these things look meticulous, magical and random. Seeing this documentary, it seems that everything is so natural and relaxed, but there are too many uncertainties in it. We must complete a division that we can't predict within the specified time. We don't know what problems will appear in the middle, but maybe a small problem will be a lifelong regret. But we can't change these, so we have to lament the magic and uncertainty of life, and we don't know what impact it will have on us.