Question

All of the blood vessels in the human body could wrap around the world how many times if they were stretched out?

(A) Once
(B) Twice
(C) 2.5 times
(D) Three times

Answer 1

The average velocity of blood flow through each capillary vessel is approximately 99.46x10^8 m/s.

Step-by-step explanation:

The average velocity of blood flow through each capillary vessel can be determined using the formula Q = AU, where Q is the flow rate, A is the cross-sectional area, and U is the velocity of blood flow.

Given that the cardiac output is 5 liters per minute, and each capillary vessel has a diameter of 8 μm, we can calculate the cross-sectional area of each capillary using the formula A = πr^2. Substituting the values, we get A = π(4x10^-6)^2 = 50.27x10^-12 m^2.

Now, we can calculate the velocity of blood flow using the formula U = Q/A. Substituting the values, we get U = 5x10^-3 / 50.27x10^-12 = 99.46x10^8 m/s.

Therefore, the average velocity of blood flow through each capillary vessel is approximately 99.46x10^8 m/s.