Skeleton & muscles

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

The three functions of the human skeleton are , and . The main parts of the skeleton are the skull and backbone, the ribcage, the pelvis, the arms and legs. The bones in the backbone are called . The bones of the arm are the , and . The bones of the leg are the , and . The function of joints and muscles is to allow . Muscles work together in pairs called pairs - one while the other . Muscles are joined to bones by , and to other muscles by . Bones are joined to other bones by .
Fused joints have no movement, an example is the . Ball and socket joints allow wide rotation in the joint, examples are the shoulder and the . Hinged joints allow movement forward and back, examples are the knee, the , and the .