Topics: Cardiovascular system physiology, Cardiovascular system, Heart, Myocardium, Epicardium, Pericardium, Heart Chambers, atria, Ventricles, septum, heart valves, vascular system, Pulmonary Circulation, Systemic Circulation, Blood flow, Heart's Electrical Conduction System, Heartbeat Coordination, SA Node Action Potentials, SA Node, Cardiac Action Potentials, Ventricular Action Potentials, electrocardiogram

Topics: Homeostasis, Cell Physiology, Plasma Membrane, Membrane Potential, neural communication, hormonal communication, Central Nervous System, Peripheral Nervous System, Afferent Division, Special Senses, Efferent Division, Muscle Physiology, Cardiac Physiology, Blood Vessels, Blood Pressure, blood, body defenses, Respiratory System, Urinary System, Fluid balance, Acid–Base Balance, Digestive System, Energy Balance, Temperature Regulation, Endocrinology, Central Endocrine Glands, Peripheral Endocrine Glands, Reproductive System