Which structures are bundles of tissue that help the body move?

• A. Bones
• B. Muscles
• C. Cartilage
• D. Ligaments

Answer: (B)

Movement comes from contracting tissues. Skeletal muscles are made of many muscle fibers bundled together to form a muscle that can shorten. When a muscle contracts, it pulls on tendons attached to bones, crossing joints to produce movement. In this way, muscles actively generate motion, while bones provide leverage, cartilage cushions joints, and ligaments stabilize them. So the structures described as bundles of tissue that help the body move are muscles.