Question:
the volume of blood in each ventricle before the begining of atrial systole and at the end of joint diastole
Answer:
The ventricles rapidly fill during diastole and pressure within the ventricle begin to rise along with the volume. At the end of diastole, the ventricles have filled quite a bit and they are almost full. Then the atria contract, adding even more volume to ventricles. The volume of blood in the ventricles at the end of diastole is referred to as end - diastolic volume.
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