Engelsk navneord: vesicula umbilicus | |||
| 1. | vesicula umbilicus (om dyr) membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional | ||
| Termer med samme betydning (synonymer) | umbilical vesicle, vitelline sac, yolk sac | ||
| Mindre specifikke termer | sac | ||