How does the fetus survive in the mother?

How does the fetus survive in the mother? I believe this knowledge will generally be explained in biology textbooks at the compulsory education stage. Today, I will explain to you how the fetus survives in the mother's body, popularize knowledge and solve doubts.

Is the fetus developed in the mother's womb?

First, sperm and eggs combine to form fertilized eggs, and then enter the female uterus and attach to the uterine wall to begin development. The uterus is the place where the fetus grows and develops, and it is a unique organ for women. With the continuous development and growth of the fetus, the uterus will also become bigger. The fetus grows and develops in the uterus, lives in amniotic fluid, is surrounded by amniotic fluid, has amniotic membrane and chorion, and is protected by layers. At the eighth week of pregnancy, the embryo has begun to take shape, with the head standing in half of the whole carcass, eyes, ears, mouth, nose and limbs taking shape, and the heart is also found to form and beat in the early stage.

Fetuses rely on the placenta to absorb maternal nutrition.

A corpse that is 4-8 weeks pregnant is called an embryo. In the embryonic stage, some important organs are gradually formed, while in the fetal stage, other organs begin to develop and gradually mature. The development and growth of embryonic stage is that the development of head, blood vessels and heart is smaller than that of limbs, and it is a development process from head to toe. During the embryonic period, the placenta is formed between the mother and the embryo. Placenta connects mother and fetus through umbilical cord, which consists of three large blood vessels. The mother provides oxygen and nutrients to the fetus through the placenta, and the fetus can also return the waste in the blood vessels to the mother through the placenta.

Fetal development

Medically, it is called the fetus from the ninth week of pregnancy. Pregnancy 10 weeks, the wrist and ankle of the fetus develop, and the uterus will become as big as grapefruit. Pregnancy 12 weeks, the fetus has begun to take shape. At the 0/5th week of pregnancy, the development of fetal central nervous system tends to be complete, and the brain begins to produce consciousness. At 17 weeks of pregnancy, all fetal organs developed and formed, and they also had hearing. At the 20 th week of pregnancy, the reproductive organs developed further, showing the difference between men and women.

At the 23rd week of pregnancy, the fetal skeletal muscle has grown up, like a miniature baby. By the 25th week of pregnancy, the details of the fetal five senses have gradually developed and improved, with slight visual ability. At 30 weeks of pregnancy, the fetal brain continues to develop and the nervous system develops well. At 32 weeks of pregnancy, the reproductive system is almost fully developed. Until the 37th week of pregnancy, the respiratory, digestive and urinary organs such as the fetal heart and liver are formed and can survive outside the mother. People? .

Fetal development and survival is a magical process, and there is still a lot of knowledge that can't be explained by current knowledge. The wonder of nature and the wonder of biological growth and development are worthy of human respect and admiration, and human beings will continue to explore and discover in unknown fields. The process of human reproduction and gestation is the process of fetal survival and growth, respecting life and everything that the earth and nature give to human beings.