_occurs when ventricular blood volume does not change during
relaxation of the ventricles due to all four valves being closed.

Isovolumetric Phase

Explanation:

Heart contraction presents various phases that depend on the volume of blood and pressure present in each chamber. From these variables, one can plot blood volume vs pressure in an x and y axis.

This question describes a phase where all valves are closed and no changes in blood volume is present. This occurs during two parts of the heart cycle called isovolumetric (iso-: same, -volumetric: volume) phase, which can be seen during contraction and relaxation. This phenomen is due to the pressure gradients the ventricle has to overcome to open the valves.

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answer:

well the blood rushes to the vessles in your pp (lol) it also happen because u see somthin erotic or pleasing somtimes it happenes by accdent or by purberty or an dream (know an an wet dream)

explanation: