Question

How is a valve used both in your veins and in a tire pump?

a) To allow fluids to flow in only one direction
b) To raise fluids from one level to another
c) To circulate fluids within a system
d) To apply a force on the fluids

Answer 1

The answer is a to allow fluids to flow in only one direction

Answer 2

a) To allow fluids to flow in only one direction