Extra-embryonic coelom

Extra-Embryonic Coelom is a significant structure that forms during the early stages of embryogenesis. It is a fluid-filled cavity that separates the chorion from the amnion and yolk sac, and plays a crucial role in the development of the embryo.

Formation

The extra-embryonic coelom forms during the second week of embryogenesis. It begins as small, isolated cavities within the extra-embryonic mesoderm. These cavities gradually merge to form a single, large cavity known as the extra-embryonic coelom.

Function

The extra-embryonic coelom serves several important functions during embryogenesis. It provides a protective cushion for the developing embryo, and allows for the expansion and movement of the amniotic sac and yolk sac. It also plays a role in the formation of the umbilical cord and placenta, which are essential for the exchange of nutrients and waste products between the mother and the embryo.

Clinical Significance

Abnormalities in the formation or function of the extra-embryonic coelom can lead to a variety of congenital anomalies. These can include ectopic pregnancy, in which the embryo implants outside the uterus, and hydrops fetalis, a condition characterized by an abnormal accumulation of fluid in the fetus.

See Also

• Embryogenesis
• Chorion
• Amnion
• Yolk sac
• Umbilical cord
• Placenta
• Ectopic pregnancy
• Hydrops fetalis