Sinus venosus receives blood from all except ?
Ans. is 'd' i.e., Subcardinal vein Sinus venosus : It is the caudal most pa of tubular hea. At its lower end it presents right and left horns. Each horn receives blood from following three veins : Vitelline vein from yolk sac. Right vitelline vein forms terminal pa of interior vena cava. Umbilical vein from placenta. Common cardinal vein from body wall. Right common cardinal vein forms superior vena cava.
Vitelline vein
Umbilical vein
Common cardinal vein
Subcardinal vein