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November 22, 2014

Homework Help: college: zoology 251

Posted by jess on Wednesday, September 24, 2008 at 12:16pm.

i am in zoology class plz someone help me with this homework question:

Question: Sequence the following event during the cardiac cycle, in right order.

1. AV valves open; aortic valve closed;ventricular filling occuring.
2. Blood ejected from the ventricle
3. atrial contraction
4. aortic valves open
5. sa node discharges
6. ventruclar filling complete
7. second heart sound
8. aortic valve closes
9. ventricular contraction begins. AV valve closes
10. Isovolumetric ventricular relaxation
11. Isovolumetric ventricular contraction.
12. First heart sound

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