Which system includes muscles, bones, and joints?

The musculoskeletal system encompasses the muscles, bones, and joints of the body, working together to enable movement, provide structure, and protect vital organs. Muscles are responsible for generating force and enabling movement, while bones give shape and support, and joints connect bones, allowing for flexibility and movement. This system is crucial for posture, locomotion, and overall physical function, making it an integral part of human anatomy and physiology.

The other systems listed do not include muscles, bones, or joints. For instance, the nervous system comprises the brain, spinal cord, and nerves, focusing primarily on communication and control of body functions. The endocrine system is concerned with hormone production and regulation of bodily processes, while the respiratory system focuses on gas exchange and breathing, highlighting the distinct roles each system plays in maintaining bodily functions.