The integumentary system serves several critical functions, primarily protection. It acts as a barrier against environmental hazards such as pathogens, chemicals, and UV radiation. Additionally, it regulates body temperature through sweating and blood flow adjustments. The system also provides sensory information through receptors in the skin, allowing us to perceive touch, pressure, pain, and temperature. Moreover, it helps prevent dehydration by minimizing water loss and plays a role in vitamin D synthesis, which is essential for bone health. Hence, the integumentary system is vital for maintaining homeostasis and overall health.