[On the presence of specific excitation conduction tissue (Purkinje fibers) and nerve fibers in the papillary muscle of young and adult cats and rats].
D000375:Aging; D000818:Animals; D002415:Cats; D006329:Heart Conduction System; D009206:Myocardium; D009412:Nerve Fibers; D010210:Papillary Muscles; D011690:Purkinje Fibers; D051381:Rats
AGING; HEART CONDUCTION SYSTEM; MYOCARDIUM