The ultrastructure of the rat sino-atrial node.
D000818:Animals; D002467:Cell Nucleus; D003593:Cytoplasm; D005260:Female; D006056:Golgi Apparatus; D008297:Male; D008854:Microscopy, Electron; D008931:Mitochondria, Muscle; D009210:Myofibrils; D051381:Rats / Q000033:anatomy & histology*; D012849:Sinoatrial Node / Q000166:cytology* / Q000294:innervation