title: Cardiac muscle. A comparative ultrastructural study with special reference to frog and chicken hearts.
mesh_terms: D000367:Age Factors; D000818:Animals; D001001:Anura; D002462:Cell Membrane; D002645:Chickens; D004721:Endoplasmic Reticulum / Q000166:cytology; D006325:Heart Atria / Q000166:cytology; D006329:Heart Conduction System / Q000166:cytology; D006352:Heart Ventricles / Q000166:cytology; D006652:Histological Techniques; D008322:Mammals; D008854:Microscopy, Electron; D009206:Myocardium / Q000166:cytology*; D009210:Myofibrils; D009413:Nerve Fibers, Myelinated / Q000166:cytology; D009441:Neurilemma / Q000166:cytology; D009474:Neurons / Q000166:cytology