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(cardiac cycle/ ECG, layers of the heart, chambers of the heart, disorders…
cardiac cycle/ ECG
the cardiac cycle is your heartbeat, and the rythem of it
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the sound "dub" is caused by the closure of the semilunar valves during contraction of the ventricles
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the different waves the ECG can capture are called ; P-wave, associated wit depolarization of the atria, QRS- associated with depolarization of the ventricles and repolarization of atria, T-wave- is associated with repolarizaion of the venticles
layers of the heart
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endocardium
simple squamous, epithelium, continues with blood vessles
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