Why is it that the temperature is important to environment?

Temperature receptors are located throughout the skin. There are tiny blood vessels, called capillaries, beneath the skin. Those vessels not only bring blood to the skin, they exchange heat. Because the skin is in contact with the environment, heat or cold can travel through it and affect the temperature of the capillaries. The blood in these vessels then travels through the body and transfers that temperature change to larger blood vessels, the venules and arterioles. The venules and arterioles become veins (which take blood to the heart) and arteries (which take blood away from the heart) and continue exchanging heat, which ultimately changes the core temperature of the body.