atrium of the heart(n = noun.body) atrium cordis - the upper chamber of each half of the heart;
is a kind of atrium
has parts: atrial auricle, auricle, auricula atrii, auricula, auricular appendage, auricular appendix
has particulars: atrium dextrum, right atrium, right atrium of the heart, atrium sinistrum, left atrium, left atrium of the heart

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