The connection of the embryo with the placenta is through the umbilical cord – an elastic cord along which two arteries and a vein pass from the placenta to the baby. Arteries provide delivery of oxygen and nutrients from the placenta to the fetus, and veins carry blood to the placenta for purification and oxygenation. Through the placenta, the fetus receives all the substances necessary for its development: glucose, proteins, fats, hormones, vitamins, water and mineral salts, oxygen and even antibodies.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.