What is the primary function of the skeletal system?

• A. To provide movement
• B. To store energy
• C. To provide structure, support, and protection to the body
• D. To produce hormones

Answer: (C)

The primary function is to provide structure, support, and protection for the body. The skeleton forms the framework that gives us shape and supports body weight, while also shielding vital organs—like the skull protecting the brain, the ribcage guarding the heart and lungs, and the vertebral column protecting the spinal cord. Movement relies on muscles pulling on bones, which act as levers and attachment points; the bones themselves don’t generate movement, they enable it. Additional roles include storing minerals such as calcium and phosphorus, and producing blood cells in bone marrow, but these are secondary to the main purpose. Hormone production is not the primary function of bones.