Question

Which characteristics of capillaries cause restriction of blood flow?

high blood pressure

small diameters

thin walls

short lengths

Answer 1

Think about how much pressure you need to force, let's say, 100 mL of fluid through a pipe with a big diameter. Not a lot. The fluid flows through freely. Now think about how much pressure you need to force the same amount of fluid through a very narrow pipe in the same amount of time - a lot.

Answer 2

so....b?

Answer 3

I think it is.

Answer 4

thanx