English dictionary
yolk sac meaning and definition
Definition and meaning of yolk sac at MeaningMonkey.org. yolk sac meaning and definition in the English Dictionary.YOLK SAC noun
Definition of yolk sac (noun)
- membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
- synonyms: umbilical vesicle, vesicula umbilicus, vitelline sac
- membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
Source: Princeton University Wordnet