title: Electron microscopy of the sinoatrial node of the squirrel monkey Saimiri sciureus.
mesh_terms: D000818:Animals; D000882:Haplorhini / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D009210:Myofibrils; D012849:Sinoatrial Node / Q000098:blood supply / Q000166:cytology*