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Embryonic Structures > Embryo, Mammalian > Extraembryonic Membranes > Chorion
Tissues > Membranes > Extraembryonic Membranes > Chorion

Preferred term

Chorion  

Type

  • Topical Descriptor

Broader concept

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Scope note

  • The outermost extra-embryonic membrane surrounding the developing embryo. In REPTILES and BIRDS, it adheres to the shell and allows exchange of gases between the egg and its environment. In MAMMALS, the chorion evolves into the fetal contribution of the PLACENTA.

History note

  • 78(75); was see under FETAL MEMBRANES 1963-77

In other languages

  • korion

    Finnish

  • chorion
  • sikiön suonikalvo
  • suonikalvo
  • ulompi sikiökalvo
  • Korion

    Swedish

URI

http://www.yso.fi/onto/mesh/D002823

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