The Cardiac Cycle

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• 2. What effect does the recoil of the elastic tissue have on the presssure in the ventricles? (2, 5, 7)
• 3. What happens to the walls when blood leaves the heart? (3, 5, 7)
• 4. What do the artery walls close to the heart have a lot of? (7, 6)
• 5. What are the valves doing while the atria contract? (4, 6, 4)
• 6. What pushes the atrio-ventricular valves open? (5, 2, 3, 5)
• 7. Beofre ventricular contraction, what is happening to the semilunar valves? (4, 3, 6)
• 8. What causes the chambers to increase in volume during diastole? (7, 6)