Question

what is vasodilation and vasoconstriction

Answer 1

Widening of blood vessels is called vasodilation.Narrowing of blood vessels is called vasoconstriction.

Answer 2

Answer:

When we are hot blood flow in capillaries increases because blood vessels to the skin capillaries get wider this is known as vasodilation

When we are cold blood flow in capillaries slows down because arterioles leading to the skin capillaries get narrower this is known as vasoconstriction