The integumentary system includes the skin, hair, nails, and glands. It has several key functions:
- Protection: Shields the body from injury, germs, and harmful substances.
- Sensation: Contains nerves that sense touch, pain, and temperature.
- Temperature Regulation: Helps control body heat through sweating and blood flow.
- Excretion: Removes waste through sweat.
- Vitamin D Production: Helps make vitamin D when exposed to sunlight.
This system is essential for protecting the body and maintaining overall health.