amnion /am·ni·on/ (am´ne-on) bag of waters; the extraembryonic membrane of birds, reptiles, and mammals, which lines the chorion and contains the fetus and the amniotic fluid.amnion´ic 
amniot´ic
)
Amnion, chorion, and other embryonic membranes surrounding the embryo of a placental mammal.
amnion nodo´sum a nodular condition of the fetal surface of the amnion, observed in oligohydramnios associated with absence of the kidneys of the fetus.
amnion no·do·sum (n -d s m)n. Nodules in the amnion that consist of stratified squamous epithelium. Also called squamous metaplasia of amnion. |
amnion
the innermost membrane enclosing the developing fetus and which is filled with amniotic fluid; characteristic of reptiles, birds and mammals. See also amniotic.
amnion nodosum
a nodular condition of the fetal surface of the amnion, observed in oligohydramnios associated with absence of the kidneys in the fetus.
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