Which skin function aids in the regulation of body temperature?

The regulation of body temperature is primarily facilitated by the secretion function of the skin, particularly through the production of sweat. When the body temperature rises, sweat glands in the skin secrete sweat onto the surface. As this sweat evaporates, it cools the skin and helps lower the overall body temperature. This process is a critical mechanism the body uses to maintain thermal homeostasis, especially during physical activity or in hot environments.

In contrast, absorption refers to the skin's ability to take in certain substances, which does not play a role in temperature regulation. Excretion involves the removal of waste products, such as salts and urea, through sweat but is not the primary method for regulating temperature. Protection relates to the skin's ability to act as a barrier against environmental factors, pathogens, and physical damage, which is essential for overall health but does not directly contribute to temperature control.