What are the main functions of the integumentary system?

The integumentary system plays several essential roles in maintaining homeostasis and overall health, with functions that predominantly include protection, temperature regulation, sensation, and metabolic functions.

Protection is one of the primary functions of the integumentary system, as the skin acts as a barrier against pathogens, chemicals, and physical injury. It safeguards the underlying tissues and organs from external threats.

Temperature regulation is facilitated by the skin's ability to adjust blood flow and sweat production. When the body overheats, sweat glands release moisture, which evaporates and cools the surface of the skin. Conversely, in cold temperatures, blood vessels constrict to conserve body heat.

Sensation is a critical function, as the skin is rich in sensory receptors that detect touch, pain, pressure, and temperature changes. This sensory input is vital for the body's interaction with the environment and aids in protective reflexes.

Metabolic functions are also significant, including the synthesis of vitamin D when the skin is exposed to sunlight. Vitamin D is essential for calcium absorption and bone health. The skin may also play a role in the metabolism of certain hormones and other molecules.

The other options focus on functions that are not primarily associated with the integumentary system. Immune response, fat storage, nutrient