Term Name: | parietal yolk sac |
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Synonyms: | primary yolk sac |
Definition: | tissue that consists of two cellular layers (parietal endoderm and trophoblast) separated by a relatively thick nonvascular basement membrane (Reichert's membrane), and acts as a protective layer to supports and facilitates transport of nutrients between the uterine tissue and the yolk sac cavity. |
Ontology: | Uberon Ontology [UBERON:0008853] |