MEDICAL PHYSIOLOGY

Detailed explanation-1: -Normally, the vessels that supply blood to the skin constrict or narrow in response to cold temperatures. This reaction, called “vasoconstriction, ‘’ decreases blood flow to the skin, which helps to minimize heat loss from the warm blood and therefore preserve a normal internal or “core” temperature.

Detailed explanation-2: -The blood vessels are dilated so more blood flows near and at the surface of your body to allow heat to be lost to the air. The smallest blood vessels, the capillaries, also dilate and this makes your skin feel warm to the touch. The blood vessels will narrow again when the body temperature is back to normal.

Detailed explanation-3: -The skin’s immense blood supply helps regulate temperature: dilated vessels allow for heat loss, while constricted vessels retain heat. The skin regulates body temperature with its blood supply.

Detailed explanation-4: -Skin blood vessels dilate increasing blood flow to skin causing heat to exudes from the skin. Sweat glands initiate sweating which allows for evaporation of the sweat causes cooling.

Detailed explanation-5: -Blood vessels supplying blood to the skin can swell or dilate-vasodilation. This causes more heat to be carried by the blood to the skin, where it can be lost to the air. Blood vessels can shrink down again-vasoconstriction.