Labels:background | bannister | car | fence | fountain | hakham | pavement | plant | sidewalk | stairs | stairway | traffic light | tree OCR: HELP Introduction Excretion Page Imagine what your house pinom be like you never threw anything away Trash and germs would build up and poison you Your body produces chemical waste products all the time Ithas to get rid of these chemic cals to stay healthy This process is called excretion in this section you will learn about the excretory system. chemicals ithis aboui
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