| NOMBRE | animal | saco vitelino | membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional |
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| Sentido | membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional. | |
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| General | saco | A structure resembling a bag in an animal |
| Inglés | yolk sac, vitelline sac, umbilical vesicle, vesicula umbilicus | |
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