Allantoic sac

allantoic sac

allantoic sac al·lan·to·ic sac (āl’ən-tō’ĭk, -ān-)
The dilated distal portion of the allantois.


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  • Allantoic vesicle

    allantoic vesicle allantoic vesicle n. The hollow part of the allantois.

  • Allantoic stalk

    allantoic stalk allantoic stalk n. The narrow connection between the intraembryonic portion of the allantois and the extraembryonic allantoic vesicle. Historical Examples Krause maintains that all the other embryos shewing an allantoic stalk at an early age are pathological. The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour The intra-embryonic portion […]

  • Allantoid

    Also, allantoidal [al-uh n-toid-l] /ˌæl ənˈtɔɪd l/ (Show IPA). . the allantois. adjective relating to or resembling the allantois (botany) shaped like a sausage noun another name for allantois allantoid al·lan·toid (ə-lān’toid’) or al·lan·toid·al (āl’ən-toid’l) adj. Of or having an allantois. Shaped like a sausage. n. See allantois.

  • Allantoid membrane

    allantoid membrane allantoid membrane n. Allantois.

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