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SAI International School
                                            Subject- Biology, Class-VII
                                      Topic- Transportation and Excretion
                                Subtopic- Excretory System of Human Beings
                                                       Module- 22
                                                     Lesson notes





               EXCRETORY SYSTEM OF HUMAN BEINGS


               The human excretory system is composed of -
                     A pair of kidneys,
                     Two tubes; called ureter
                     A urinary bladder
                     Urethra
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