What systems does the musculoskeletal system include?

The musculoskeletal system includes both bones and muscles, which work together to support and protect the body. This system plays a crucial role in enabling movement and maintaining posture. Bones provide the structural framework that supports the body and protects vital organs, while muscles attach to bones and facilitate movement through contraction. Additionally, tendons and ligaments, which connect muscles to bones and bones to each other, are integral components of this system, further aiding in stability and motion.

The other options do not encompass the full scope of the musculoskeletal system. While bones alone would not be sufficient to define the system, as they need muscles for movement and function. Nerves and tissues pertain more to the nervous and connective tissue systems, respectively. Skin and mucous membranes are associated with the integumentary system, which serves to protect the body but does not involve the support and locomotion functions provided by bones and muscles. Thus, the comprehensive description in the correct choice accurately reflects the essential components and functions of the musculoskeletal system.