1 masseter trapezius triceps gluteus biceps femoris calf muscle pectoral biceps abdominals qudriceps tibialis anterior Muscles Muscles are elastic organs attached to our bones. They contract and relax to move our bones. 7 ●●○ COPY and COMPLETE the sentences in your notebook Our skeleton is made up of bones and … Bones are … organs. Muscles are … organs. Muscles pull on the … and help them to move. B e a Sc i e nt i s t ! OBSERVE Bend your arm. Which joint do we use to bend it? Which bones meet at this joint? Which muscle is contracted? t h i r t e e n · 13
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