1.2.5　Temperature regulation function

On the one hand，the skin senses changes of the external environment temperature through the peripheral temperature sensors throughout the body，and sends information to the hypothalamus；on the other hand，the skin acts as a body temperature regulating effector to regulate body temperature via vasomotion，chills，or sweating after receiving central information.

The skin covers the whole body，and arteriovenous anastomosis is abundant.During cold stress，sympathetic nerves are excited，blood vessels contract，arteriovenous anastomosis are closed，skin blood flow and skin heat dissipation are reduced.When arteriovenous anastomosis are gently opened during heat stress，skin blood flow and skin heat dissipation are increased.Body surface heat dissipation is mainly achieved through radiation，convection，conduction，and sweat evaporation.When the ambient temperature is too high，the main method of heat dissipation is the evaporation of sweat.(https://www.daowen.com)