Question

Name the extra-embryonic membranes. Give one significance of each.

Answer 1

The extra-embryonic membranes and one significance of each are:

1. Amnion: Encloses the embryo in amniotic fluid, which cushions it against shocks and prevents drying.
2. Yolk sac: Provides early stem cells that form blood and lymphoid cells.
3. Chorion: Forms chorionic villi that contribute to the foetal part of the placenta.
4. Allantois: Forms blood vessels in the umbilical cord and contributes to the foetal part of the placenta.