AP BIOLOGY

ANIMAL PHYSIOLOGY

HUMAN CIRCULATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

To which chamber of the heart does an oxygen-rich blood from the lung return?

A	left atrium
B	left ventricle
C	right atrium
D	right ventricle

Explanation:

Detailed explanation-1: -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. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.

Detailed explanation-2: -The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.

Detailed explanation-3: -Pulmonary veins: Deliver oxygen-rich blood from the lungs to the left atrium of the heart. 9. Left atrium: Receives blood returning to the heart from the pulmonary veins.

Detailed explanation-4: -The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.

There is 1 question to complete.