What two systems help the skin regulate body temperature?

1. The circulatory system: The skin has a network of blood vessels that helps to regulate body temperature. When the body is too hot, the blood vessels dilate and more blood flows to the skin, which helps to dissipate heat. When the body is too cold, the blood vessels constrict and less blood flows to the skin, which helps to conserve heat.

2. The sympathetic nervous system: The sympathetic nervous system is responsible for controlling the sweat glands in the skin. When the body is too hot, the sympathetic nervous system stimulates the sweat glands to produce sweat, which evaporates and helps to cool the skin.