Sinus venosus receiver blood from all except: (A) Vitelline vein, (B) Umbilical vein, (C) Common cardinal vein, (D) Sub cardinal vein
Answer is D. Each horn of sinus venosus receives blood from following three pair of veins, vetelline veins (from yolk sac), umbitical veins (from placenta) and common caralinal veins (from body wall).