Final answer:
The end diastolic volume (EDV) or preload is approximately 120 to 130 mL in the left ventricle of an average adult, representing the volume of blood in the ventricles at the end of atrial systole before ventricular contraction.
Step-by-step explanation:
The end diastolic volume (EDV), also known as preload, is the measure of the amount of blood in the ventricles right at the end of atrial systole and just before the beginning of ventricular contraction. In the average adult, this volume can be approximately 120 to 130 mL in the left ventricle. The end diastolic volume is a critical determinant of stroke volume and cardiac output during the cardiac cycle.
During the ventricular ejection phase, the contraction of the ventricular muscle raises the pressure inside the ventricle to the point that it exceeds the pressures in the major arteries. With a normal stroke volume ranging between 70-80 mL and an end diastolic volume around 130 mL, we're left with an end systolic volume (ESV) of about 50-60 mL in the ventricle after the blood has been pumped out.
The maximum volume of blood in the left ventricle is known as the end diastolic volume (EDV). This is the amount of blood in the ventricle at the end of atrial systole just prior to ventricular contraction. The EDV is typically around 130 mL.
During ventricular contraction, a portion of the blood is pumped out, leaving behind the end systolic volume (ESV). The ESV is approximately 50-60 mL.
So, the maximum volume of blood in the left ventricle, or the EDV, is around 130 mL.