The Heart - CARDIOVASCULAR SYSTEM Transports oxygen and...

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1 CARDIOVASCULAR SYSTEM – serves as medium of transport – conducts blood through two circulatory systems: – a pump that moves blood through the vessels Transports oxygen and nutrients to body tissues, removes wastes Blood Vessels – Carry blood away from the heart –Tiniest vessels; thin, –Exchange of materials between blood & body cells –Return blood to the heart
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2 Pulmonary Circulatory System Right side of the heart pumps Blood becomes oxygenated Oxygenated blood Systemic Circulatory System Oxygenated blood is pumped Oxygenated blood is circulated to the tissues— Blood is returned to the
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3 Human Heart Descending Aorta (to lower body) Inferior Vena Cava (from lower body) Superior Vena Cava (from upper body) Lt Atrioventricular Valve Rt Atrioventricular Valve Blood Flow Through the Heart (a) Atria Contract (b) Ventricles Contract (c) Heart Relaxes; atria fill passively
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4 Coordination of Heart Activity • Cardiac muscle cells show – Communicate by • Contraction initiated and coordinated by pacemaker:
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The Heart - CARDIOVASCULAR SYSTEM Transports oxygen and...

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