CirculatorySystem - The Circulatory System The Heart,...

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The Circulatory System The Heart, Blood Vessels, Blood Types
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  The Closed Circulatory System Humans have a  closed circulatory system typical of all vertebrates, in which blood is  confined to vessels and is distinct from the  interstitial fluid. The heart pumps blood into large vessels  that branch into smaller ones leading into the  organs. Materials are exchanged by diffusion between the  blood and the interstitial fluid bathing the cells.
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  The Cardiovascular System Three Major Elements –  Heart, Blood Vessels, &  Blood 1.   The Heart - cardiac  muscle tissue highly interconnected  cells four chambers Right atrium Right ventricle Left atrium Left ventricle
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  Pathway of the blood Superior Vena Cava Right Atrium Tricuspid Valve Right Ventricle Pulmonary Semilunar Valve Lungs Pulmonary Vein Bicuspid Valve Left Ventricle Aortic Semilunar Valve Aorta To the bodies organs & cells
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  Circuits Pulmonary circuit The blood pathway  between the right side of  the heart, to the lungs,  and back to the left side  of the heart. Systemic circuit The pathway between  the left and right sides of  the heart.
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  The Cardiovascular System 2.  Blood Vessels -A network of tubes Arteries arterioles  move away from the heart Elastic Fibers Circular Smooth Muscle Capillaries  – where gas exchange takes place. One cell thick Serves the Respiratory System Veins Venules  moves towards the heart Skeletal Muscles contract to force blood back from  legs One way values When they break - varicose veins form
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  The Cardiovascular System 3. The Blood A. Plasma Liquid portion of the blood.  Contains clotting factors,  hormones, antibodies,  dissolved gases, nutrients  and waste
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  The Cardiovascular System The Blood B. Erythrocytes - Red  Blood Cells Carry hemoglobin and  oxygen.  Do not have a  nucleus and live only  about 120 days.
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This note was uploaded on 02/07/2011 for the course NURSING 351 taught by Professor Brown during the Spring '11 term at SIU Carbondale.

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CirculatorySystem - The Circulatory System The Heart,...

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