Cardiovascular_and_Lymphatic_Systems

Cardiovascular_and_Lymphatic_Systems - Cardiovascular and...

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Cardiovascular and  Lymphatic Systems Chapter 10
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Structures of the Cardiovascular System
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Heart
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Facts about heart About size of a fist located behind sternum Beats about 100,000 times a day, 35 million times a year, 2.5 billion times in an average lifetime
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Tricuspid Valve valve between right atrium and right ventricle
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Bicuspid Valve Located between left atrium and left ventricle (also called mitral valve)
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Semilunar Valves Located between right ventricle and pulmonary artery and between left ventricle and the aorta
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3 layers of the heart 1. Pericardium - two layer sac covering the heart Visceral pericardium- lies closest to myocardium Parietal pericardium (epicardium)- lines pericardial sac
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2. Myocardium - middle, thick muscular layer 3. Endocardium - inner lining of the heart
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Blood Vessels Tube-like structures that carry blood through-out the body
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Arteries Blood vessels that carry blood away from the heart. Pulmonary artery different than other arteries because it carries blood low in O2 and high in CO2 from heart to lungs
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Arterioles Smallest arteries
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Aorta Largest artery in the body
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Veins Blood vessels that carry blood back to the heart. Pulmonary veins carry oxygenated blood from the lungs to the heart
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Venules Smallest veins
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Venae Cavae Largest veins in the body. Inferior V.C. carries blood to heart from body parts below diaphragm Superior V.C. carries blood to heart from the upper part of the body
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Capillaries Microscopic blood vessels that connect arterioles with venules
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blood Composed of plasma and formed elements (erythrocytes, leukocytes, thrombocytes)
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Plasma Liquid portion of blood, where cells are suspended
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Erythrocytes Red blood cells
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Leukocytes White blood cells that fight infection
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Platelets (thrombocytes) Part of blood that is responsible for clotting
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Structures of Lymphatic System
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lymph Transparent, usually colorless, tissue fluid
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Lymph Nodes Small, spherical bodies made up of lymphoid tissue. Found singularly or in groups, act as filters keeping pathogens from getting into blood
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Spleen Located left side of abdominal cavity between stomach and diaphragm. In adults largest lymphatic organ in body
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Thymus Gland One of the primary lymphatic organs, located anterior to ascending aorta and posterior to sternum between lungs. Important to immunity from infancy to puberty then atrophies into connective tissue and doesn’t function
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This note was uploaded on 11/22/2010 for the course HSC 2531 taught by Professor Chancey during the Spring '10 term at Santa Fe College.

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Cardiovascular_and_Lymphatic_Systems - Cardiovascular and...

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