The Four Chambers · Heart
The powerhouse — pumps oxygen-rich blood to the whole body.
One chamber pushes blood to your whole body — brain to toes. That's the left ventricle, your heart's strongest room, and the thump you feel in your chest.
Blood enters from the left atrium through the mitral valve, then the left ventricle fires it through the aortic valve into the aorta and out to everything: brain, muscles, fingertips, toes.
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