Which of the following chambers or vessels carry deoxygenated blood in the human heart?
(A) 1 only
(B) 2 and 3
(C) 1, 2, 3, 4
(D) 4 and 5

Pumping blood through the human heart must be carefully organized for maximal efficiency and to prevent backflow. In the figure below, the blood enters the heart through the vena cava (1), passes through the right atrium and right ventricle and then goes through the pulmonary artery toward the lungs. After the lungs, the blood returns through the pulmonary vein and then passes into the left atrium and the left ventricle before leaving the heart via the aorta.

Transcribed Image Text:

5. 1 2 8 3 7 5