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Amniotic sac

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.04 sec.
amniotic sac
n.
See amnion.
Amniotic sac
The membranous sac that surrounds the embryo and fills with watery fluid as pregnancy advances.
Mentioned in: Childbirth
amniotic sac,
n a thin membrane that completely surrounds the embryo and contains a protective fluid in which the embryo is immersed. Also called the
amnion.
amniotic sac amnion, bag of waters, membranes Obstetrics An amniotic fluid-filled thin membraned sac which surrounds the embryo of amniote vertebrates, and provides a fluid cushion, prevents dehydration, acting as a waste receptacle during embryonic development. See Amnion.


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? Mentioned in ? References in periodicals archive
 
Deep inside his blackberry-shaped blastocyst, some of his cells clumped together to form an "inner cell mass" that would later become Jacob's body, umbilical cord, and amniotic sac.
The amazing placenta: take a closer look at the organ your baby ... by Buckley, Sarah J. / Mothering
The boy had been born at 34 weeks' gestational age (weight 2,300 g), and he was treated for a few days with antimicrobial drugs after prolonged rupture of amniotic sac membranes, even though early-onset infection had not been confirmed.
Human metapneumovirus RNA in encephalitis patient by Simon, Arne / Emerging Infectious Diseases
With another set of experiments, they uncovered evidence that SPA triggers birth by activating fetal immune cells called macrophages, which then leave the amniotic sac and travel to the uterus.
Fetal lungs tell mom when to deliver baby by Travis, John / Science News
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