Which statement regarding the mammalian heart is correct?
A. Blood is pumped from the heart via the atria.
B. Oxygen-loaded blood moves only through the right side of the heart.
C. When the right atrium contracts, it forces blood into the left atrium.
D. In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.
Answer:D
Which statement regarding the mammalian heart is correct?
A. Blood is pumped from the heart via the atria. B. Oxygen-loaded blood moves only through the right side of the heart. C. When the right atrium contracts, it forces blood into the left atrium. D. In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.