A typical human blood pressure is 120/80.Since the heart is NOT pumping during diastole,how is it possible that the diastolic pressure is as high as 80 rather than falling to 0?
A) Muscle tone,the small continuous contractions of resting muscle,maintains enough compression on the blood vessels to produce the low diastolic pressure.
B) The elastic walls of the arteries are stretched during systole;they recoil during diastole,compress the blood,and keep it pressurized until the next heartbeat.
C) Valves in the veins open and close to produce a secondary pumping that operates independently of the heart.
D) The pressure during diastole is produced by gravity and the weight of the blood;diastolic pressures are highest in the feet (120/120) and lowest in the brain (120/0) .
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