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Amnion   Listen

(pl. amnia, amnions)
Thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals).  Synonyms: amnios, amniotic sac.

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"Amnion" Quotes from Famous Books

... life. At that early stage of the animal existence the bladder resembles a long tube, which is prolonged through the navel string and opens into the outermost of the two water bags in which the fetus floats. In this way the urine is prevented from entering the inner water bag (amnion), where it would mingle with the liquids, bathing the skin of the fetus and cause irritation. At birth this channel closes up, and the urine takes the course normal to extra-uterine life. Imperfect closure is more frequent ...
— Special Report on Diseases of the Horse • United States Department of Agriculture

Words linked to "Amnion" :   mammal, amnic, sac, fetal membrane, mammalian, amniotic, amniote, amniotic sac

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