vitelline vein การใช้

• It receives blood from the vitelline vein, umbilical vein and common cardinal vein.
• The human venous system develops mainly from the vitelline veins, the umbilical veins and the cardinal veins, all of which empty into the sinus venosus.
• Blood is conveyed to the wall of the yolk sac by the primitive aorta, and after circulating through a wide-meshed capillary plexus, is returned by the vitelline veins to the tubular heart of the embryo.
• Blood is conveyed to the wall of the sac by the vitelline arteries ( a branch of the dorsal aorta ), and after circulating through a wide-meshed capillary plexus, is returned by the vitelline veins to the tubular heart of the embryo.