The Body as a Whole Practice Test

The musculoskeletal system comprises bones, joints, and muscles that support the body and enable movement. Bones form the rigid framework of the skeleton, protect internal organs, act as levers for muscles to produce motion, store minerals, and house bone marrow for blood cell production. The structure described in the question that fits this system is bones. Hair belongs to the integumentary system, spleen to the immune/lymphatic system, and lungs to the respiratory system.