connected to left cardiac atrium left atrium of heart BTO:0001702 atrium sinistrum left cardiac atrium cardiac left atrium MA:0000074 heart left atrium left atrium Wikipedia:Left_atrium XAO:0003191 NCIT:C12869 SCTID:244387002 A cardiac atrium that is in the left side of the heart. It receives oxygenated blood from the pulmonary veins, In mammals this is pumped into the left ventricle, via the Mitral valve. EMAPA:17315 AAO:0010247 galen:LeftAtrium FMA:7097 VHOG:0000369 EHDAA2:0000275 cardiac atrium blood vasculature left cardiac chamber