Thesaurus: yolk sac
membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
Related headwords
membranousdefinitionstructuredefinitionyolkdefinitionbecomesdefinitionbirdsdefinitioncirculatesdefinitioncirculatorydefinitiondevelopingdefinitioneggsdefinitionembryodefinitionembryosdefinitionenclosingdefinitionfishesdefinitionfunctionaldefinitionfunctionsdefinitionheartdefinitionmammaliandefinitionmarsupialsdefinitionnutrientsdefinitionreptilesdefinitionsystemdefinitionuntildefinitionyokesneighboryokethneighboryokibusneighboryokingneighboryokohamaneighborYokutsneighbor
Definitions
- n. membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
- n. membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo