Yolk Circulation Circle

The vitelline circulation is an important element in the development of mammals. It provides nutrition and respiration to the fetus during the first weeks of life.

The yolk sac is the main source of nutrients for the embryo. It contains the yolk, which consists of fats, proteins and carbohydrates. The yolk sac also contains blood vessels that circulate blood between the embryo's body and the yolk sac.

The blood vessels in the yolk sac are called vitelline vessels. They have thin walls and allow blood to pass through them, which carries nutrients to the embryo. In addition, the yolk vessels also allow gas exchange between the blood and the air inside the yolk sac.

Once the yolk sac begins to decrease in size, the yolk circulation becomes less important to the embryo. However, it may still play a role in mammalian development. For example, the yolk sac may contain hormones that regulate embryonic development.

The yolk circulation plays an important role in the life of a baby. It is a system of blood vessels through which blood flows from the body of the embryo to the yolk sac. This system provides the embryo with oxygen, nutrients, carbohydrates, hormones, enzymes so that it develops and grows. It also removes metabolic products from the blood

The yolk sac is the part of the amnion that develops along with the fetus. The yolk sac does not have a specialized circulatory system. Blood from the fetal bloodstream passes through it, giving away nutrients and being saturated with CO2. The fetal circulation is formed by the 28th day of intrauterine development. The circulation itself is formed later and represents a system of blood vessels that connect the fetus to the fetal sac, without which the fetus cannot develop normally.