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Cardiovascular Review- SA
|- join the arterial system with the venous system - most significant of blood vessels - provide cells with vital products - remove waste products from cells
|Describe the heart
|- a hollow, muscular organ lying in the mediastinum that propels blood to entire body
|Describe the SA node
|- located in upper portion of right atrium - has own built-in rhythm - initiate & transmit each heartbeat - sets basic pace for cardiac rate
|How do veins return blood to the heart?
|- skeletal muscle contraction - gravity - respiratory activity - valves
|How is blood supplied to the heart muscle?
|Name the factors that influence blood pressure
|- resistance of blood flow - pumping action of heart - viscosity of blood - elasticity of artery -quantity of blood
|Name the four structures responsible for electrical conduction of the heart
|- sinoatrial node - atrioventricular node - bundle of His -Purkinje fibers
|Name the three layers of the heart
|- endocardium - myocardium - epicardium
|What are the three layers of artery walls?
|- tunica externa - tunica media - tunica intima
|What are the three major types of blood vessels?
|- arteries - veins - capillaries
|What are valves?
|small structures within the veins that prevent the backflow of blood
|What is endocarditis?
|inflammation of the inner lining of the heart and its valves
|What type of blood do arteries carry?
|What type of blood do veins carry?
|Where is each heart valve?
|- tricuspid valve - right atruium & right ventricle - pulmonic valve - pulmonary artery & right vetricle - mitral (bicuspid) valve - left atrium & left ventricle - aortic semilunar (aortic) valve - aorta & left ventricle