The loss and gain of energy in the body needs to be balanced and controlled so internal temperature remains constant. To do this the blood and tissue in your body transfers energy from the core of your body to your exterior by dilating the veins (if you are hot) or retains heat by contract the veins (if you are cold). Your body can tell your exterior temperature through receptors in your skin. The receptors send a message to the brain which then sends a message to the effectors that carry out the reaction.
- How does the body control temperature?