Vasodilation and Exercise: How Your Body Cools Down

The statements best illustrate vasodilation.

Vasodilation is the widening of blood vessels, which allows more blood to flow through them. When a person does strenuous exercise, the body needs to cool down. The small blood vessels near the surface of the skin increase in diameter, which allows more blood to flow to the skin's surface. This helps to dissipate heat and cool the body down.