Which of these is NOT a function of the skin?

The function of the skin encompasses several critical roles, but digestion is not one of them. The skin serves as a protective barrier, helping to shield the body from pathogens, environmental damage, and dehydration. It is also integral to sensation, allowing the body to perceive touch, temperature, and pain through a network of nerve endings. Moreover, the skin plays a vital role in heat regulation through processes such as sweating and blood flow adjustment. In contrast, digestion occurs within the digestive system, involving the breakdown of food and absorption of nutrients, which is not a function of the skin. Understanding the specific functions of various body systems, including the skin, is essential for grasping overall human physiology and how interconnected these systems are.