encyclopedia of medical concepts
ψ 
ψ 

Chorion

More information in Books or onNLM PubMed
Definition: 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.     
See Also Chorioallantoic Membrane
Examples Chorionic Villi 		Other names Chorions
 
SubstanceCAS Registry & nameCategoriesSource
choriogenin H  0   *Egg Proteins *Protein Precursors Chorion. Proc Natl Acad Sci U S A 1997 Mar 4;94(5):2050-5
chorion proteins  0   *Egg Proteins Chorion Membrane Proteins. J Biol Chem 253(4):1305;1978; Nature 1980;284(5757):635

To share this definition, click "text" (Facebook, Twitter) or "link" (blog, mail) then paste text link
Ads by Google

Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
Warning: the drugs or drug combinations referred to here may be similar or related, but are not be the same ones and may not have the same pharmacological action as other substances described on the same page or in the same row. Please refer to product monograph or to your doctor
This website is accredited by Health On the Net Foundation. Click to verify. We comply with the HONcode standard for trustworthy health information: verify here.
About Reference.MD Privacy