Qrs complex electrical forces of ventricular

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QRS Complex- electrical forces of ventricular depolarization; ventricular contraction. ST Segment- mark the time where the ventricles contract and send blood to the lungs and to the rest of the body. T Wave- repolarization of the ventricles occurs; they relax. 7 Explain control of the cardiac cycle. The Cardiac Cycle is controlled by the Cardiac Conduction System; this system includes the SA node, AV node, and the Autonomic Nervous System. The Medulla of the brainstem 15.4 Blood Vessels 8 Compare the structures and functions of the major types of blood vessels. 9 Describe how substances are exchanged between blood in capillaries and the tissue fluid surrounding body cells. 15.5 Blood Pressure 10 Explain how blood pressure is produced and controlled. 11 Describe the mechanisms that aid in returning venous blood to the heart. 15.6 Paths of Circulation 12 Compare the pulmonary and systemic circuits of the cardiovascular system. 15.7–15.8 Arterial System–Venous System 13 Identify and locate the major arteries and veins. 15.9 Life-Span Changes 14 Describe life-span changes in the cardiovascular system.
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