Chorion: The outermost fetal membrance in human embryos, the villous part of which becomes the fetal part of the placenta. SYN: membrana serosa (1). [G. chorion, membrane enclosing the fetus]
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.
Chorion: outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals).
Source: WordNet 2.1
Chorion: 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.
Source: MeSH 2007
Source - MeSH 2007
Source - MeSH 2007
Source - MeSH 2007
Source - WordNet 2.1
Source: CRISP
The following list attempts to classify Chorion into categories where each line is subset of the next.
Source: WordNet 2.1
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