title: The ascidian myocardium: sarcoplasmic reticulum and excitation-contraction coupling.
mesh_terms: D000818:Animals; D002118:Calcium; D002467:Cell Nucleus; D002816:Chordata, Nonvertebrate; D004721:Endoplasmic Reticulum; D004847:Epithelial Cells; D006321:Heart / Q000502:physiology; D007365:Intercellular Junctions; D007477:Ions; D008854:Microscopy, Electron; D008928:Mitochondria; D009040:Motion Pictures; D009119:Muscle Contraction; D009206:Myocardium / Q000166:cytology*; D010781:Photography; D012508:Sarcolemma; D012519:Sarcoplasmic Reticulum
chemical_list: D007477:Ions; D002118:Calcium