Question

The purpose of blood pressure in the human body is to push blood to the tissues of the organism so that they can perform their functions. each time the heart beats, it pumps out blood into the arteries. the blood pressure reaches its maximum value, i.e., systolic pressure, when the heart contracts to pump the blood. in between beats, the heart is at rest and the blood pressure falls to a minimum value, diastolic pressure. an average healthy person has systolic and diastolic pressures of 120 and 80 mmhg, respectively. the human body has about 5.6 l of blood. if it takes 20 s for blood to circulate throughout the body, estimate the power output of the heart.

Answer 1

first 120/80= 3/2
in 5.6 = 3/2x 5.6= 8.4