English dictionary
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English noun: yolk sac | |||
| 1. | yolk sac (animal) membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional | ||
| Synonyms | umbilical vesicle, vesicula umbilicus, vitelline sac | ||
| Broader (hypernym) | sac | ||
| 2. | yolk sac (animal) membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo | ||
| Broader (hypernym) | sac | ||
Based on WordNet 3.0 copyright © Princeton University.
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Web design: Orcapia v/Per Bang. English edition: .
2024 onlineordbog.dk