Heart, blood, and circulation Assignment

The left ventricle has a thicker muscle layer as it has to push the blood further. **Both the pulmonary valve and the aortic valve are SEMI-LUNAR VALVES . Atrioventricular Valves: flaps of tissue that separate the atria from the ventricles. These valves prevent the blood from flowing in the reverse direction when the ventricles contract. Right side “Tricuspid”—three cusps, or flaps. Left ... ................
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