title: Heart.
mesh_terms: D000109:Acetylcholine / Q000502:physiology; D000138:Acidosis / Q000503:physiopathology; D001341:Autonomic Nervous System / Q000502:physiology; D003097:Collateral Circulation; D003331:Coronary Vessels / Q000502:physiology; D006321:Heart / Q000294:innervation / Q000502:physiology*; D006728:Hormones / Q000502:physiology; D000860:Hypoxia / Q000503:physiopathology; D009119:Muscle Contraction; D009124:Muscle Proteins / Q000096:biosynthesis; D009206:Myocardium / Q000378:metabolism; D018377:Neurotransmitter Agents / Q000502:physiology; D011188:Potassium / Q000502:physiology
chemical_list: D006728:Hormones; D009124:Muscle Proteins; D018377:Neurotransmitter Agents; D000109:Acetylcholine; D011188:Potassium