extraembryonic membrane

Embryol.
any of the tissues, derived from the fertilized egg, that enclose or otherwise contribute to the support of the developing embryo, as the yolk sac, allantois, amnion, and chorion. Also called embryonic membrane.

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Universalium. 2010.

Look at other dictionaries:

  • extraembryonic membrane — Embryol. any of the tissues, derived from the fertilized egg, that enclose or otherwise contribute to the support of the developing embryo, as the yolk sac, allantois, amnion, and chorion. Also called embryonic membrane …   Useful english dictionary

  • extraembryonic membrane — ex′traembryon′ic mem′brane n. dvl any of the membranes derived from embryonic tissue that lie outside the embryo, as the allantois, amnion, chorion, and yolk sac …   From formal English to slang

  • membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m …   Medical dictionary

  • Extraembryonic coelom — Infobox Embryology Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Caption2 = System = CarnegieStage = 6a Days = 12 Precursor = Heuser s membrane GivesRiseTo = MeshName = MeshNumber = DorlandsPre = c 44 DorlandsSuf = 12247640 The… …   Wikipedia

  • extraembryonic membranes — the membranous structures that surround the embryo and contribute to the placenta and umbilical cord. They include the amnion, chorion, allantois, and yolk sac. In humans the allantois is always very small and by the end of pregnancy the amnion… …   Medical dictionary

  • extraembryonic membranes — the membranous structures that surround the embryo and contribute to the placenta and umbilical cord. They include the amnion, chorion, allantois, and yolk sac. In humans the allantois is always very small and by the end of pregnancy the amnion… …   The new mediacal dictionary

  • chorioallantoic membrane — (1) Protective membrane around the eggs of insects and fishes. (2) Extraembryonic membrane surrounding the embryo of amniote vertebrates. The outer epithelial layer of the chorion is derived from the trophoblast, by the apposition of the… …   Dictionary of molecular biology

  • embryonic membrane. — See extraembryonic membrane. [1945 50] * * * …   Universalium

  • embryonic membrane — em′bryon′ic mem′brane n. dvl extraembryonic membrane • Etymology: 1945–50 …   From formal English to slang

  • embryonic membrane. — See extraembryonic membrane. [1945 50] …   Useful english dictionary

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