Page 32 - SCIENCE
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              SCIENCE  AND  ENVIRONMENT                                1st  Grade  -  Primary  Education








                                        Respiratory  system





















                                                                                          then  enter
                                                                                          through  a  tube  called
                                                the  air  enters
                                                                                          trachea  and  reaches
                                                to  your  body
                                                                                          the  lungs.
                                                through  the  nose.











                                                                        From  the  lungs  the
                                                                        air  passes  into  the  blood
                                                                        and  it  spreads  all  over
                   Do  the  following  activity:                        the  body.














                                                inspire


                                                                 expire














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