Blood temperature is measured by a part of your brain called the hypothalmus.
When you are hot blood vessels in the skin dilate and alow more blood flow through the capillaries. This means that more heat is lost through the surface of the skin - vasodilation.
In cold condition, blood vessels in the skin constrict, reducing the amount of blood flow and heat is lost from the surface, causing us to shiver - this is called vasoconstriction.
Comments
No comments have yet been made