heart
Help!
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| Path of blood from heart | artery, arteriole, capillary, venule, vein
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| largest blood vessel | artery
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| where gasses & nutrients are exchanged | capillaries
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| eurethrocytes | red blood cells
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| leukocytes | white blood cells
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| thrombocytes | clotting cells (platelets)
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| coronary artery | artery that supplies myocardium of heart
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| thickest muscle of heart | Left Ventricle
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| when pressure inside ventricle is higher than that in the atria | AV valves shut to prevent backflow of blood
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| Pulmonary artery | Blood vessel that carries deO2 blood to the lungs
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| Left AV valve | Mitral/Bicuspid
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| AV Valves attached w/ | tendon chords to papillary muscles
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| separates thoracic cavity from abdominal cavity | Diaphram
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| pulmonary trunk divides into... | left and right pulmonary artery
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| ability to self excite | autorythmicity
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| conduction system of heart | SA node, AV node, av bundle (of HIS), bundle branches, perkinje fibers
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| SA node | Pacemaker of heart
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| end diastolic volume | amount of blood in ventricle before contraction
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| end systolic volume | amount of blood in ventricles after contraction
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| Stroke volume | End diastolic - end systolic
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| Epinephrine | released by sympathetic NS raises heart rate
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| Thyroid | increases heart rate
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| when pressure in left Ventricle is greater than in aota... | Aortic semi-lunar valve opens & blood is ejected out of heart
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| attaches to hemoglobin giving blood its red color | oxygen
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| gap junction | electrical connect in cardiac muscle
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| parasympathetic nerve that effects SA & AV node | Vagus #10
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| contractility | muscles ability to generate force
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| force | pressure forcing blood out of ventricles
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| Starlings Law | when rate of blood flow to heart from veins increases/decreases heart automatically adjusts to match outflow
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| increased venous return = | increased ventricular output
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| preload | amount of blood in ventricles before they contract
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| afterload | pressure in aorta during ejection phase
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