embryonic membrane

embryonic membrane

n. See fetal membrane.

ex′traembryon′ic mem′brane

n. any of the membranes derived from embryonic tissue that lie outside the embryo, as the allantois, amnion, chorion, and yolk sac.

Thesaurus

Noun

1.

embryonic membrane - the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)caul, veilfetal membrane - any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetusplacenta - the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus