how does the body protect itself from heat and cold
In cold weather, the arteries and veins nearer the skin have less blood passing through them and the ones further into the body have more thereby retaining heat. The hairs on most parts of your body also stand up to trap a layer of air for insulation.The body when cold frequenly shivers.n warm weather, the opposite happens. Hairs lie down and the arteries and veins nearer the skin fill up thereby letting heat energy conduct radiate out of the body. The body has pours. These secret sweat which acts as a cooling agaent.