48. Calculate the minimum pressure required to force the blood from the heart to the top of the heart (vertical distance 50cm) assume the density of blood to be 104g/cm3 friction is to be neglected

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The minimum pressure require to force the blood of density 1.04 g cm^-3 from the heart to the top of the head (vertical distance = 60 cm) is:

Q. The human heart discharges

75 c m^{3}

of blood per beat against an average pressure of

10 c m

H g

. Assuming that the pulse frequency is

75 / m i n u t e

, the power of the heart is (density of

H g = 13.6 g m / c m^{3}

Q. The human heart forces

4 \times 10^{- 3} m^{3}

of blood per minute through the arteries under a pressure of

0.13

m. Calculate the horsepower of the heart. The density of blood is

1.03 \times 10^{3}

m^{- 3}

. Take

g = 9.8 m s^{- 2}

and

1

H.P.

= 746

Question 21
Choose the correct statement that describes arteries.

(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart.
(b) They have thin walls with valves inside, blood flows under low pressure and carries blood away from the heart to various organs of the body.
(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.
(d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.

Q. Select the correct direction of flow of oxygenated blood from the heart. (Top to Bottom)

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