The speed of blood
The aorta (the main blood
vessel coming out of the heart) has a radius of about 1.0 cm and the total cross section of the major arteries is about 20 cm2.
The density of blood is about the same as water, 1 g/cm3.
- Given that the velocity of blood pumping through the aorta is
about 30 cm/s, what is the total current of the blood passing through the
aorta (in mass of blood per second)?
- If all the blood that flows through the aorta then branches
into the major arteries, what is the velocity of blood in the major arteries?
- The blood flowing
in the major arteries then branches into the capillaries. If
the velocity of blood in the capillaries is measured to be 0.03 cm/s, what is
the cross sectional area of the capillary system?
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Page last modified
February 23, 2006: M18