________ Carries poorly oxygenated blood into the right atrium
A)Ductus arteriosus
B)Septum primum
C)Sixth pharyngeal arch artery
D)Sinus venosus
E)Umbilical vein

Question

Quizplus · Accepted Answer

The sinus venosus initially is a separate chamber of the heart that opens into the caudal wall of the right atrium.The right horn of the sinus venosus becomes incorporated into the wall of the right atrium and forms its smooth-walled part called the sinus venarum.The left horn of the sinus venosus becomes the coronary sinus.

________ Carries Poorly Oxygenated Blood into the Right Atrium