vitelline circulation
— Navneord
– Engelsk
~ circulation of blood between the embryo and the yolk sac
vitelline sac
— Navneord
– Engelsk
~ membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
vitellus
— Navneord
– Engelsk
~ nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg)