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Definition of Papillary muscle
1. Noun. Any of several muscles associated with the atrioventricular valves. "The papillary muscles contract during systole to prevent regurgitation of blood into the atria"
Medical Definition of Papillary muscle
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1. Noun. Any of several muscles associated with the atrioventricular valves. "The papillary muscles contract during systole to prevent regurgitation of blood into the atria"
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