What does the term "skeletal system" refer to?

The term "skeletal system" refers specifically to the framework that supports the body, which includes all the bones and joints that provide structure and stability. This system is fundamental for several reasons: it protects vital organs, allows for movement in conjunction with the muscular system, and serves as a reservoir for minerals such as calcium and phosphorus. Additionally, it is involved in the production of blood cells within the bone marrow.

Understanding the skeletal system's role emphasizes its importance in overall health and functionality. The other options, while related to aspects of the body, do not define the skeletal system accurately. The muscles pertain to the muscular system, the nervous system relates to nerve signals and communication within the body, and connective tissue encompasses a broader category of tissues that include ligaments and tendons, not specifically identifying the structure provided by the bones.