The Four Chambers · Heart
Pumps oxygen-poor blood on the short trip to the lungs.
The lower right chamber of your heart pushes oxygen-poor blood to your lungs. It's a short trip, so this pump — the right ventricle — doesn't need to be very strong.
Blood drops in from the right atrium through the tricuspid valve, then gets pumped out through the pulmonary valve into the pulmonary artery, headed for the lungs to pick up oxygen.
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