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chantalprince
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Homework Statement
The aorta carries blood away from the heart at a speed of about 40 cm/s and has a radius of approx. 1.1cm. The aorta branches eventually into a large number of tiny capillaries that distribute the blood to the various body organs. In a capillary, the blood speed is approx. 0.07 cm/s, and the radius is about 6 x 10 -4 cm. Treat the blood as an incompressible flulid and use these data to determine the approx number of capillaries in the human body.
Homework Equations
I think: A1 x V1 = A2 x V2 and A = pi (r)^2
A = cross sectional area of tube
V= velocity
The Attempt at a Solution
I have figured out the areas of the cross sections of the capillary and the aorta.
I have labeled them: Ac and Aa respectively.
Ac= 1.13097 x 10^-6 cm^2
Aa= 3.8013 cm^2
I cannot figure out where to go with this information. It seems like I need to know a volume or a length of some sort.
Can anybody help me out please?
Thanks!
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