Electron microscope studies on the cardiac conduction system of the dog. II. The sinoatrial and atrioventricular nodes.
D000818:Animals; D001283:Atrioventricular Node; D004285:Dogs; D004583:Electrons; D006321:Heart / Q000033:anatomy & histology*; D006329:Heart Conduction System; D008853:Microscopy
HEART/anatomy and histology