CELLxGENE logo
CellGuide
CELLxGENE logoApplicationCollectionsDatasetsGene ExpressionCell Guide
Beta

CensusAPIModels
Help & Documentation
Yolk Sac
UBERON:0001040
A sac-like expansion of the ventral wall of the intestine, narrowed into a yolk stalk near the body[Hyman's]. Membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals. It functions as the developmental circulatory system of the human embryo, before internal circulation begins. In the mouse, the yolk sac is the first site of blood formation, generating primitive macrophages and erythrocytes[WP].
Source: UBERON Ontology
Cell Ontology
Cell ontology visualization unavailableThe cell ontology visualization for this cell type is currently not available.