1. THE HEART
TWO PUMPS BEAT AS ONE…

8. * AV valves forced shut; QRS complex; semilunar valves closed
* Ventricles relaxed; AV and semilunar valves closed; AV valves open, ventricular filling occurs
P wave of ECG; atrial contraction forces remaining blood into ventricles
* AV valves forced shut; QRS complex; semilunar valves closed
* Ventricles contract; semilunar valves open; blood forced out of ventricles
*Ventricles relax; blood in aorta and pulmonary trunk flow backward; semilunar valves close

9. Auscultation of thorax:
2 major sounds
1. Lub = blood turbulence of AV valves closing (R/S)
2. Dup = semilunar valves closing (after T)