Which of the following is NOT a function of the skin?

The skin serves several critical functions, including protection, sensation, and temperature regulation. Protection involves acting as a barrier against pathogens, harmful substances, and physical injuries, effectively shielding internal body structures. Sensation allows the body to perceive changes in the environment through various receptors that detect touch, pressure, pain, and temperature. Temperature regulation is achieved through processes such as sweating and blood flow adjustment, helping to maintain homeostasis.

Digestion, however, is not a function of the skin. This process occurs primarily in the digestive system, involving organs such as the stomach and intestines, where food is processed and nutrients are absorbed. The skin does not play a role in breaking down food or absorbing nutrients, which is why it is considered not a function of the skin.