The primary purpose of the skeletal system is to provide structure and support to the body. The skeleton serves as a framework that supports and shapes the body, allowing for movement, as it provides attachment points for muscles. It also protects vital organs, such as the heart and lungs, enveloping them in rigid structures, like the rib cage. Additionally, the skeletal system plays a crucial role in the production of blood cells within the bone marrow and stores essential minerals, like calcium and phosphorus. Overall, it is vital for overall body function and movement.