Assertion: left atrioventricular valve | /r/CapableOf | lie within the aorta
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Source sentences:
text: The two semilunar valves are named after the vessel they lie within: the left semilunar valve is called the aortic valve because it lies within the aorta; the right semilunar valve is called the pulmonic valve because it lies within the pulmonary artery.