| NOUN | animal | yolk sac, vitelline sac, umbilical vesicle, vesicula umbilicus | membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional |
|---|---|---|---|
| animal | yolk sac | membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes |
| Meaning | membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional. | |
|---|---|---|
| Synonyms | vitelline sac, umbilical vesicle, vesicula umbilicus | |
| Broader | sac | A structure resembling a bag in an animal |
| Spanish | saco vitelino | |
| Meaning | membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo. | |
|---|---|---|
| Broader | sac | A structure resembling a bag in an animal |
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