What happens when your too Cold?

-Erector Muscles Contract -- Hairs stand up. This can trap Insulating Layer of Air, warming you up -Little to None Sweat is made -Blood vessels Contract [Vasoconstriction] meaning Less blood can flow near the Surface = Less energy Transferred -Shivering [Done by contraction of Muscles] happens. This needs Respiration to happen which makes Energy to heat the Body