Fine structure of the impulse-conducting system in rat heart.
D000818:Animals; D002467:Cell Nucleus; D006329:Heart Conduction System / Q000166:cytology; D008854:Microscopy, Electron; D008928:Mitochondria; D009413:Nerve Fibers, Myelinated; D011689:Purkinje Cells; D051381:Rats; D012583:Schwann Cells; D012849:Sinoatrial Node / Q000166:cytology*