Circulatory System - PC\|MAC

Circulatory System - PC\|MAC

Circulatory System Cardiac Cycle DHO8 7.8, pg 192 HS1/2017-2018 Cardiac Cycle The R & L side of the heart work together. The heart is 2 pumps. Systole=period

of ventricular contraction Diastole=period of ventricular rest (when ventricles arent contracting) https://www.smm.org/heart/heart/top.html About your heart-Science Museum of Minnesota Cardiac Cycle

Blood Pressure=measurement of the force of blood pushing against the artery walls Top number is systolic Bottom number is diastolic If BP is too high, it puts strain on the arteries & heart https://www.youtube.com/watch?v=qWti317qb_w (Understanding BP) 2.49

Cardiac Cycle Normal BP 120/80 Hypertension (High BP) 140/90 https:// www.youtube.com/watch?v=S648xZDK7b0 (Instructional Video for BP) 4.30 Cardiac Cycle

Heart Rate: Number of times heart contracts in 1 min Normal 60-100 Sounds you hear (Lub-dub) are the valves closing. First (S1) the AV valves and second (S2) the semilunar. http://www.stethographics.com/main/physiology_hs_introduction.html Do You Know? The second heart sound (S2), described as dub, is actually the sound of the:

a) Atria contracting b) Ventricles contracting c) Semilunar valves closing d) AV valves closing And the answer isC

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