The primary purpose of the human skeleton is to provide structural support to the body. It serves as a framework that shapes and protects vital organs, such as the heart, lungs, and brain. The skeleton also enables movement by serving as an attachment point for muscles. Moreover, it plays an essential role in blood cell production through the bone marrow and in the storage of minerals like calcium and phosphorus. Overall, the skeletal system is crucial for overall health, mobility, and protection.