Amnion
Amnion
The Amnion (pronounced: /ˈæmniən/) is a membranous sac that surrounds and protects an embryo. It is a vital part of the amniotic fluid system in mammals, birds, and reptiles.
Etymology
The term "Amnion" originates from the Greek word "amnion", meaning "lamb", and "amnos", meaning "bowl". This is in reference to the sac's function of holding the embryo, similar to how a bowl holds its contents.
Function
The primary function of the amnion is to provide a protective environment for the developing embryo or fetus. It does this by producing amniotic fluid, which cushions the fetus from physical impact, provides a constant temperature, and allows for freedom of movement which aids in the development of the musculoskeletal system.
Related Terms
- Amniotic fluid: The fluid within the amnion that surrounds and protects the fetus.
- Amniocentesis: A medical procedure where a small amount of amniotic fluid is sampled to screen for developmental abnormalities in a fetus.
- Amniotic sac: The sac formed by the amnion and the chorion in which the fetus develops.
- Chorion: The outermost membrane surrounding an embryo; it forms the fetal part of the placenta.
See Also
External links
- Medical encyclopedia article on Amnion
- Wikipedia's article - Amnion
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