1) The body gets rid of waste materials by.......process. a) digestion b) excretion c) sensation 2) All of the following are responsible for excretion process , except a) digestive system b) skin c) respiratory sytem d) urinary system 3) The blood which carries the waste materials, enters each kidney through a large a) vein b) artery c) blood capillary d) ureter 4) Urea is formed due to the breaking down of a) acids b) carbohydrates c) proteins 5) Among the organs of the urinary system are a) stomach and kidneys b) kidneys and gallbladder c) kidneys and bladder d) urethra and heart 6) The tube which transports the urine from the bladder is the a) vein b) esophagus c) urethra d) artery

Excretion

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