Musculoskeletal System

• Bones


  Hard, rigid organs that make up the skeleton
• Muscles


  Tissues that contract to produce movement
• Joints


  Areas where two or more bones meet
• Ligaments


  Tough bands of connective tissue that connect bones to other bones
• Tendons


  Tough bands of connective tissue that connect muscles to bones
• Muscle contraction


  The process by which muscles shorten and produce force
• Osteoblasts


  Cells that build new bone tissue
• Osteoclasts


  Cells that break down and remove old or damaged bone tissue
• Range of motion


  The extent to which a joint can move
• Muscle tone


  The slight tension present in a muscle at rest
• Bone density


  The amount of bone tissue in a given volume of bone