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24 terms

Heart and Circulation

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apex
the name for the tip of the heart
SA and AV nodes
cardiac muscle tissue that is specialized to conduct rather than contract is found in these
left atrium and ventricle
chambers of the heart that contain freshly oxygenated blood
right atrium and ventricle
chambers of the heart that contain deoxygenated blood
SA node
commonly called the "pacemaker"
epicardium
layer of the heart that is on the very outside surface
"lub" sound
caused by AV valves closing
coronary arteries
heart muscle is oxygenated by
chordae tendinae
connected to the cuspid valves to prevent them from flapping backwards
Papillary muscles
found in the ventricles
interventricular septum
separate the ventricles
myocardium
muscular heart wall
aortic semilunar valve
prevents the backflow of blood into the left ventricle
Heart murmurs
caused by leaking valves
myocardial infarction
death of heart tissue itself
Tachicardia
very rapid heart beat
Lidocaine
slows down the heart
EKG
recording of the heart's electrical charges
systole
Contraction of the heart
120
Normal systolic pressure for an adult
Veins
have valves to prevent deoxygenated blood from collecting in your extremities
aorta
major artery containing oxygenated blood
plaque
build-up of fats and cholesterol on vessel walls
diastole
relaxing heart