What body system regulates temperature absorbs vitamins protects skeleton and organs?

The body system that regulates temperature, absorbs vitamins, and protects the skeleton and organs is the integumentary system. This system includes the skin, hair, nails, and glands. The skin plays a crucial role in temperature regulation through sweat and blood flow, while also aiding in the absorption of certain vitamins, such as vitamin D. Additionally, it provides a protective barrier for underlying organs and skeletal structures.