Amnion and Chorion are two types of membranes that are formed to be part of the sac in which the embryo is suspended. These membranes are two important parts of the sac due to the various functions which they perform. However, there are some differences between the two. Amnion is the innermost membrane which covers the embryo throughout the various physical developments of the unborn.
During the pregnancy period, the amnion is formed in mammals, birds, reptiles but not in amphibians. The amnion protects the unborn child against any form of injury. A part of the amnion is filled with a liquid known as amniotic fluid. This fluid will surround a developing fetus and act as a shock absorber.
On the other hand, the chorion is the outer case or membrane that attaches the embryo to the uterus. The embryo, amnion, and other membranes are surrounded by the chorion. Trophoblast and the mesoderm are present in the chorion, while trisodium and ectoderm are present in the amnion.
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