The extraembryonic mesoderm supports the epithelium of the amnion and yolk sac as well as the villi, which arise from the trophoblastic tissue. It also is involved in the development of the fetal blood.
Develops on day 8 in humans. On day 12 of human development, the extraembryonic mesoderm splits to form the chorionic cavity.
Multiple AncestorsSingle AncestorNo DescendantsDevelops fromPart of Parent