How is the skeletal system defined?

The skeletal system is defined as the framework of the body. This system consists of bones and cartilage, which provide structure, support, and shape to the body. It protects vital organs, enables movement by acting as levers for the muscles, and serves as a site for mineral storage and blood cell production within the bone marrow. The importance of the skeletal system is fundamental in maintaining overall physical stability and health.

While the other options mention important bodily systems and structures, they do not accurately describe the primary role of the skeletal system. For instance, a network of muscles pertains to the muscular system, which works alongside the skeletal system for movement. Nervous system components refer to the structures that handle signal transmission and sensory input, which are distinct from the skeletal structure. Connective tissue structures involve a broader category that includes bones, cartilage, ligaments, and tendons but does not specifically encompass the whole function of the skeletal system as a body framework. Thus, the choice that best encapsulates the definition of the skeletal system is its role as the framework of the body.