Engelsk navneord: vitelline sac | |||
1. | vitelline sac (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, vesicula umbilicus, yolk sac | ||
Mindre specifikke termer | sac | ||