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Chap15Heart

QuestionAnswer
base of the heart broadest part
apex of the heart loudest beat, fifth intercostal space
pericardium sac around the heart, anchor to chest wall
endocardium thin, inside layer smooth to prevent clotting
myocardium thickest working layer
epicardium thing layer or epithelial cells, outside
2 atria top, pumps within heart
2 ventricles bottom, pumps outside of heart
left ventricle highest pressure, does most work
superior and inferior vena cava deoxygenated blood
pulmonary artery carries deoxygenated blood to lungs
pulmonary veins oxygenated blood from lung
aorta largest artery, oxygenated blood to whole body
heart valves prevent backflow
what causes the lub dub sound? valves snapping close
sa node pacemaker of the heart, primary
normal sinus rythum must go in order; sa node, av node, purkinje fibers
disrythmia sinus rhythm out of order
systole contraction
diastole relaxation
cardiac output blood pumped in 1 min
heart rate BPM
stroke volume blood ejected by ventricle
what is important to have good circulation? clean and open veins
preload tension in ventricular muscle before it contracts
contractility force of ventricular ejection occurs
afterload force the heart must work against
how to calculate cardiac output? heart rate x stroke volume = cardiac output
Created by: Lynne2712
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