amnion
- n thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
- Another kept it going through 28 transplantations in cells of human amnion ("bag of waters").
- However, most physicians believe the limbs are prevented from growing normally by the adhesions or contractions of the amnion, the sac that contains the embryo, or by lack of .
- Both male female babies slough off many different types of cells into the amnion ("bag of waters") in which they are carried.