Semilunar valves open when the pressure below the valve, in the ventricle, is greater than the pressure in the artery.
Semilunar valves open when the pressure below the valve, in the ventricle, is greater than the pressure in the artery.
| Front | Explain, in terms of pressure, why the semilunar valves open. ( 1 mark) |
|---|---|
| Back | Pressure is greater below valve/in ventricle than (artery); |
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