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                                  Chapter Eleven
         FOR ONLINE USE ONLY



               The human digestive system





              Human beings eat food in order to live. The human body is
              made up of several systems. In this chapter, you will learn
              about the digestive system and its importance.

              Study the following diagram and then read the description
              that follows.



                                                                             Throat



                       Mouth                                                 Oesophagus

                                                                             (gullet)


                                                                             Stomach
                        Liver



              Gall bladder                                                   Pancreas

                                                                           Small intestine



                                                                           Large intestine
                                                                           (Colon)
               Rectum
                                                                         Anus

                                  Figure The human digestive system


              Digestion is the process of breaking down large food substances
              into smaller soluble food substances. Soluble food substances

              can be easily absorbed in the body.


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                                     PROPERTY OF UNITED REPUBLIC OF TANZANIA GOVERNMENT
                                           Ministry of Education, Science and Technology
       Science  and Technology 3.indd   88                                                    03/08/2019   11:02
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