Page 40 - ACTIVE SCIENCE 4 TOC
P. 40

Circulatory and

                          5                Excretory System












            Learning Objectives


                   To Understand:
                   •  The circulatory system               •  The excretory system


                   To Find Out:
                   •  What are arteries?                   •  About capillaries
                   •  What is urethra?




            Let’s Begin


            The body of living things need energy to work. This energy, they get from food they
            eat. The food after digestion, needs to be carried to all the body parts. The energy
            contained in food reaches to all the body parts by the circulatory system. When the

            body uses energy for various activities, a number of waste products are produced.
            The excetory system removes these wastes from the body.

            Tick the correct box based on whether you can see the body part from

            outside or not.




               1.                Heart                     can see                         cannot see


               2.              Kidneys                     can see                         cannot see


               3.                Brain                     can see                         cannot see


               4.                Eyes                      can see                         cannot see



               5.                Ears                      can see                         cannot see



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