The main function of bones is to provide support and structure to the body. Bones serve as a framework for muscles to attach to, which allows for movement and locomotion. Additionally, bones protect and support internal organs, such as the brain, heart, and lungs. Bones also play a role in mineral storage and release, as they contain a significant amount of calcium, phosphorus, and other minerals. They serve as a reservoir for these minerals, releasing them into the bloodstream when needed to maintain proper levels in the body.