Junior Cert Science - Biology - The Skeleton and Muscular Systemskeleton.gif

Gap-Filling Quiz

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   bone      bones      brain      Cartilage      fused      humerus      joints      Ligaments      lungs      many      moveable      movement      one      relaxation      socket      spinal      tibia      tissue      triceps      vertebrae   
The functions of the skeleton are support, and protection. Bone is a living . The main bones in the arm are , radius and ulna. The main bones in the leg are the femur, and fibula. The skull protects the , the rib cage protects the heart and , while the backbone protects the chord. The spine is made up of bones called . A joint is where meet. The two types of joint are joint and moveable joint. Fused joints do not allow movement between the bones e.g. the skull. Ball and joints and hinge joints are examples of joints. Ball and socket joints allow movements in directions while hinge joints allow movement in direction only. Muscles are attached to by tendons, and by contraction and of muscles, the bones move. connect bone to bone. prevents bones from rubbing off each other. Synovial fluid lubricates the . Antagonistic muscles such as the biceps and work opposite each other to cause movement.