atrium of the heart

1. The upper chamber of each half of the heart (synset 105400573)
   is a type of: atrium - any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
   subtypes:

   • atrium dextrum, right atrium, right atrium of the heart - the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus
   • atrium sinistrum, left atrium, left atrium of the heart - the left upper chamber of the heart that receives blood from the pulmonary veins
   has:

   • atrial auricle, auricle, auricula atrii - a small conical pouch projecting from the upper anterior part of each atrium of the heart
   • auricula, auricular appendage, auricular appendix - a pouch projecting from the top front of each atrium of the heart
   same as: atrium cordis

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