Histology of the atrial portion of the cardiac conduction system in man and other mammals.
D000818:Animals; D006321:Heart / Q000033:anatomy & histology*; D006325:Heart Atria; D006329:Heart Conduction System; D006801:Humans; D008297:Male; D008322:Mammals; D009206:Myocardium / Q000033:anatomy & histology*
MYOCARDIUM/anatomy and histology