chorioallantoic placenta
Quick Summary
The chorioallantoic placenta is a vital organ in the reproduction of many animals, particularly mammals. It forms from the fusion of two extraembryonic membranes: the chorion and the allantois.12
Function and Formation
This combined membrane plays a crucial role in providing the developing embryo with essential resources and removing waste products. In mammals, the chorion develops a rich network of blood vessels and closely associates with the uterine lining (endometrium). Together, the chorion and the endometrium form the placenta.2
The allantois contributes its blood vessels to the chorion, further enhancing the placenta's vascularization. This allows for efficient exchange of nutrients and oxygen from the mother to the embryo, and the transfer of carbon dioxide and metabolic wastes from the embryo back to the mother for disposal. This complex structure ensures the survival and growth of the embryo within the uterus.13
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