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GRADE: IV, , SCIENCE WORKSHEET-8, , 06.09.21, , 4.THE JOURNEY OF FOOD – EXCRETORY SYSTEM, I CHOOSE THE CORRECT ANSWER:, 1.The __________________ system is responsible for clearing the wastes from, our body., a.Circulatory b.Respiratory c.Digestive d.Excretory, 2.The __________________ is not an organ of the excretory system., a.Stomach b .Skin c.Lungs d.Kidney, 3.The tubes in the urinary system are called the __________________, a.Urinary bladder b.Kidneys c.Ureters d.Urethra, 4.Which of the following is harmful to our digestive health?, a.Eating at regular intervals, b. Drinking adequate water, c.Urinating frequently, d. Overeating, 5.The colour of healthy and well hydrated person urine is______, a. pale yellow b.Colour less/clear c.Dark yellow / orange, II Fill in the blanks, 1.The EXCRETORY system gets rid of waste water through the kidney., 2.The SKIN releases sweat., 3.The urinary system has 2 kidneys., 4.We should wash our hands BEFORE eating to avoid infections., 5.kidneys send the urine to the URINARY BLADDER_ through tubes called, _URETER., 6.Urine is released from our body through a thin tube called URETHRA_., 7. Kidney filter the wastes from the BLOOD_., 8. Urinary system excretes _URINE_., 9.Skin excretes waste in the form of _SWEAT., 10. EXCRETORY_system is called garbage collector., III TRUE OR FALSE, 1., 2., 3., 4., 5., , The lungs exhale waste air from the body. TRUE, The skin releases sweat. TRUE, Kidney is used to filter toxins from our blood. TRUE, Eating only junk food improves digestion.FALSE, The toxins in our body, if not excreted frequently, can cause, infections.TRUE

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6. It is not necessary to wash hands after using the toilet.FALSE, IV ANSWER THE FOLLOWING:(JUST FOR RECAPITULATION):, 1. Describe the roles played by different parts of the body in getting, rid of waste., 2. Define excretion., 3. What are the organs of the excretory system?, 4. What are the different forms of waste sent out from the body?, 5. Draw and label the parts of the urinary system., 6. Anuj just used the toilet and noticed that his urine is dark yellow in, colour. Is Anuj drinking enough water? What would you advise him?, 7. List any two habits for a healthy digestive system., 8. List any two habits that will harm the digestive system., 9. List any two habits for a healthy excretory system., 10.List any two habits that will harm the excretory system.