Cardiovascular
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| sends deoxygenated blood to the lungs | pulmonary circuit
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| sends oxygen rich blood to the lungs | systemic circuit
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| sac that encloses the heart | pericardium
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| outer most layer of heart muscle | epicardium
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| thick middle layer of muscle | myocardium
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| inner most layer of heart muscle | endocardium
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| upper chambers of the heart | atria
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| lower chambers of the heart | ventricles
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| structure that separates the right side from the left side of the heart | septum
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| valve between the right atria and right ventricle | tricuspid valve
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| structures that prevent the valves from inverting | chordae tendineae
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| valve leaving the right ventricle | pulmonary valve
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| name of the pulmonary and aortic valves | semilunar valves
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| valve between the left atria and left ventricle | bicuspid
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| valve leaving the right ventricle | aortic valve
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| condition caused when the valves do not shut properly | murmers
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| name for contraction | systole
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| name for relaxation | diastole
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| series of events for a complete heart beat | cardiac cycle
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| mass of cells located in the right atrium that starts the heart beat | SA node
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| another name for the SA node | pacemakernode pacemaker
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| name of the fibers that are located in the septum between the ventricles | Bundle of His
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| fibers that innervare the ventricles allowing them to contract | Purkinje fibers
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| recording of the electrical signals in the heart | EKG
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| type of vessels that go away from the heart | arteries
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| type of vessels that lead towards the heart | veins
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| type of vessel where gas exchange occurs | capillaries
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| smooth muscle contraction | vasoconstriction
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| smoothvasoconstriction smooth muscle relaxation | vasodilationrelaxation vasodilation
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| structurevasodilation structure that veins have, but arteries do not | valvesnot valves
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| stroke volume * heart rate | cardiac output
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| friction between blood vessel walls and the blood | peripheral resistance
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| hormones for flight or fight response | epinephrine and norepinephrine
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| hormone that lowers blood pressure | ANF
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| hormone that raises blood pressure | ADH
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| hormone that is used for long term control of BP | aldosterone
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| EKG that shows atrial systole | P wave
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| EKG that shows ventricular systole | QRS complex
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| EKG that shows ventricular diastole | T wave
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| hormone that increases blood pressure by vasoconstriction | angiotensinvasoconstriction angiotensin
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| factors that effect blood pressure | cardiac output, peripheral resistance, blood volume, blood viscosity
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