This document discusses the muscles and bones in the human body. It notes that muscles are soft and elastic and can contract and relax, while bones are hard and rigid. It lists some of the largest muscles, like the gluteus, and smallest muscle, the stapedius in the ear. It also lists some of the bones in the skeleton like the femur, ribs, skull, and vertebrae. In total, adults have over 200 bones and babies have over 300 bones.