[OBSERVATIONS ON THE RETICULOENDOTHELIAL SYSTEM OF THE HUMAN SINUS NODE].
D006329:Heart Conduction System; D006652:Histological Techniques; D006653:Histology; D012157:Mononuclear Phagocyte System; D012849:Sinoatrial Node
HEART CONDUCTION SYSTEM; HISTOLOGY; RETICULOENDOTHELIAL SYSTEM