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25 votes
Oxygenated blood leaves the lungs and enters which heart chamber?

User Difster
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21 votes

left atrium

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.

User LiXCE
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