How Does the blood from the lungs travel back into the heart?
A. Lungs - pulmonary veins - left atrium - left ventricle.
B. lungs - pulmonary arteries - left atrium - left ventricle.
C. lungs - pulmonary arteries- left ventricle - left atrium.
D. lungs - pulmonary - left ventricle - left atrium.
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Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins.
The left ventricle (LV) pumps the oxygen-rich blood through the aortic valve (AoV) into the aorta (Ao), the main artery that takes oxygen-rich blood out to the rest of the body.
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