AMNION

Amnion

The amnion is a membrane building the amniotic sac that surrounds and protects an embryo. It is developed in reptiles, birds, and mammals, which are hence called “Amniota”; but not in amphibians and fish, which are consequently termed “Anamniota”. The primary role of this is the protection of the embryo for its development. It stems from the extraembryonic somatic mesoderm on the outer side and the extraembryonic ectoderm on the inner side.

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amnion

Noun

  1. The innermost membrane of the fetal membranes of reptiles, birds, and mammals; the sac in which the embryo is suspended.


The above text is a snippet from Wiktionary: amnion
and as such is available under the Creative Commons Attribution/Share-Alike License.

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