EVERYDAY SCIENCE

Detailed explanation-1: -The blood plays a role in temperature regulation. It distributes heat throughout the body, from the core to the surface and vice versa. By changing the blood flow to the skin, the body can control heat exchange at its surface with its surroundings.

Detailed explanation-2: -The body core contains a variety of blood vessels, and the bulk of blood concentrates there in the norm. Hence, heat transfer in it is mainly convective. In surface tissues, where the rate of blood circulation is lower and the vasculature has certain specific features, heat transfer is mainly conductive.

Detailed explanation-3: -A key but little understood function of the cardiovascular system is to exchange heat between the internal body tissues, organs and the skin to maintain internal temperature within a narrow range in a variety of conditions that produce vast changes in external (exogenous) and/or internal (endogenous) thermal loads.

Detailed explanation-4: -This process is called vasodilation. Vasodilation increases blood flow to the skin and helps the animal lose some of its extra heat to the environment.