Which of the following is NOT a function of the integumentary system?

The integumentary system primarily serves several key functions that support the overall health and homeostasis of the body. One of its main roles is to act as a barrier, providing protection from pathogens, which is essential for defending the body against infections and external harm. It also plays a pivotal role in sensory detection, allowing the body to perceive environmental stimuli, such as touch, temperature, and pain, through a network of sensory receptors embedded in the skin.

Temperature regulation is another critical function performed by the integumentary system. The skin helps maintain a stable internal temperature through mechanisms such as sweating and blood vessel dilation or constriction, which facilitate heat loss or retention based on the body’s needs.

However, the absorption of nutrients does not fall within the functions of the integumentary system. While the skin can absorb certain substances (like some medications) when applied topically, it does not play a role in the absorption of essential nutrients in the way that the digestive system does. Nutrient absorption primarily occurs in the intestines, which specialize in breaking down food and distributing nutrients to the body. Thus, among the options provided, absorption of nutrients distinctly stands out as not being a function of the integumentary system.