Source:http://linkedlifedata.com/resource/umls/id/C0178551
CSP: extraembryonic structure that develops from the fusion of the chorion and the allantois; in reptiles and birds, it is a membrane apposed to the egg shell; in many mammals, it forms the placenta.,NCI: The membrane in hens' eggs that helps chicken embryos get enough oxygen and calcium for development. The calcium comes from the egg shell.,CHV: the membrane in eggs that helps embryos get enough oxygen and calcium for development,MSH: A highly vascularized extra-embryonic membrane, formed by the fusion of the CHORION and the ALLANTOIS. It is mostly found in BIRDS and REPTILES. It serves as a model for studying tumor or cell biology, such as angiogenesis and TISSUE TRANSPLANTATION.