17778959
Description
Flashcards by Sam Gunnell, updated more than 1 year ago
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Created by Sam Gunnell
over 5 years ago
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| Question | Answer |
| Why does blood from the right ventricle have low pressure? | So that the capillaries aren't damaged by high pressures |
| What are the three stages of the cardiac cycle in order? | Atrial systole Ventricular systole Diastole |
| What happens during atrial systole? | The walls of the atria contract, forcing blood into the ventricles |
| What valve connects the arteries and ventricles? | Atrioventricular valve |
| What are the valves called in the aorta and pulmonary artery? | Semi-lunar valves |
| What happens during ventricular systole? | The ventricles contract |
| What do the elastic tissues in the walls of the ventricles do? | Recoil to stretch out to return ventricles to its original size |
| What causes the "lub-dub" sound of the heart beat? | The shutting of valves (atrioventricular=lub semilunar=dub) (sounds are in-order of which valve shuts first) |
| What keeps the valves from turning inside out? | Tendons |
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