title: T-system and couplings in frog myocardial cells.
mesh_terms: D000818:Animals; D001001:Anura; D001485:Basement Membrane; D008854:Microscopy, Electron; D009206:Myocardium / Q000166:cytology*; D011896:Rana temporaria; D012508:Sarcolemma; D012519:Sarcoplasmic Reticulum