A normal human aorta has a cross sectional area of about 3 cm^2.
The speed of blood through this vessel is about 30 cm/s. You may
consider blood to be an ideal fluid with the density of water.
a) If a blood clot blocks 80% of the area, with what speed will
the blood flow around the clot?
b) Find an expression for the relative change in blood pressure
at the point of the clot. Watch your units!
c) A typical capillary has a cross sectional area of about 3 x
10^-7 cm^2 and a flow speed of about 0.05 cm/s. How many
capillaries are there in the human body?