What are the functions of the skeletal system?

The skeletal system serves several vital functions essential for the overall functioning of the body. One of the primary roles is to provide shape and form, which gives the body its structure and supports movement. The bones act as a framework, allowing muscles to attach and facilitating movement when they contract.

Additionally, the skeletal system protects critical internal organs, such as the brain, heart, and lungs. The ribcage, for example, shields the heart and lungs from external trauma, while the skull protects the brain.

Another significant function is the production of blood. The bone marrow within certain bones is responsible for the production of red blood cells, white blood cells, and platelets—vital components for the circulatory and immune systems.

Thus, the functions enumerated in the correct choice highlight the multifaceted role of the skeletal system in supporting bodily structure, protecting vital organs, and being a key player in hematopoiesis (the formation of blood cellular components).