Skip Navigation

allantois, amnion, blood island, cloacal membrane, connecting stalk

A section through the caudal part of the cloacal membrane.

Observe:
1. The allantois, which is located just caudal to the cloacal membrane and is lined with endoderm.
2. The allantois, which is an extension of the yolk sac cavity that ends blindly in the connecting stalk.
3. A blood island in the tissue of the connecting stalk.
4. The two-layered amnion.


Keywords: allantois, amnion, blood island, cloacal membrane, connecting stalk

Source: Atlas of Human Embryos.