Page 13 - 新思维科学学生用书4 样章
P. 13

1  Living Things


               1.2  Why we need a skeleton





             We are going to…


             •  describe the main functions of the skeleton

             •  measure the length of bones

             •  think about why it is better to measure in standard units
             •  record data in a table.
                                                                         function       organs

                                                                         length         protect
              Getting started                                            muscles        support


              1  What is the role of the skeleton?
              2  Think of some reasons why we need a skeleton.

              3  Name any of the parts inside your body that you know of.



                                                                                   brain
           Our skeleton has four main jobs or functions.                        brain
                                                                                 skull
                                                                                   skull
           Skeletons protect



           The parts inside our bodies are called organs. The body
                                                                                   rib rib cage
           organs do important jobs that keep us alive and healthy.                cage

           Our skeletons protect the main organs of our bodies.                    spine spine

           Skeletons give shape                                                 lungs

                                                                                   lungs

           The bones of our skeleton are strong. The skeleton                   heart
                                                                                   heart
           forms a frame that supports or holds up the rest of the

           body and gives the body its shape. Our skeleton makes

           our body firm. We cannot squash our body easily because of our skeleton.


           Skeletons allow us to move



           Our skeleton helps us to walk, run and move in lots of different ways. We





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