contributes to morphology of immediate transformation of heart cardiac atrium EHDAA:1265 VHOG:0000175 ZFA:0000471 GAID:555 uberon MAT:0000496 Cardiac chamber in which blood enters the heart. galen:Atrium EFO:0000277 Wikipedia:Heart_atrium TAO:0000471 AAO:0010246 atrium of heart EV:0100019 CALOHA:TS-0437 UBERON:0002081 heart atrium BTO:0000903 MESH:D006325 SCTID:261405004 NCIT:C12728 MA:0000073 atrial tissue atrium EMAPA:16688 EHDAA2:0000154 FMA:7099 mesoderm-derived structure cardiac chamber future cardiac atrium