Digestion and getting rid of waste

Grade 7 Science Worksheet - Challenge Me

Circle the best answer.

1. 1.

   Ari takes a bite of bread, and its starch is broken down into sugar. Which path does the sugar take into the body?

   • Mouth, windpipe, lungs, then the blood
   • Mouth, esophagus, stomach, small intestine, blood
   • Mouth, esophagus, stomach, large intestine, blood
   • Mouth, esophagus, stomach, liver, small intestine
2. 2.

   A bit of Bo's apple peel can't be digested. Which path does it take through the body?

   • Mouth, esophagus, stomach, then out through the kidneys
   • Mouth, esophagus, stomach, pancreas, then out
   • Mouth, esophagus, stomach, small and large intestines, out
   • Mouth, esophagus, stomach, large intestine, small intestine, out
3. 3.

   Esme's beans have protein, which starts breaking down in the stomach. Where is its breakdown finished and absorbed?

   • In the esophagus, on the way down
   • In the large intestine, with the water
   • In the pancreas, after the beans pass into it
   • In the small intestine, with juice from the pancreas
4. 4.

   Jun makes a waste chart for three wastes. Which chart matches each waste with its exit?

   • Carbon dioxide: lungs; urine: kidneys; food leftovers: large intestine
   • Carbon dioxide: lungs; urine: large intestine; food leftovers: kidneys
   • Carbon dioxide: stomach; urine: kidneys; food leftovers: liver
   • Carbon dioxide: kidneys; urine: lungs; food leftovers: large intestine

5. Read this first

   NIH NIDDK

   fact	amount
   blood filtered by both kidneys each day	about 150 quarts
   filtered fluid that becomes urine each day	about 1 to 2 quarts
   filtering units (nephrons) in each kidney	about a million

6. 5.

   Milo reads a kidney card. The kidneys filter about 150 quarts a day, yet just 1 to 2 quarts become urine. What happens to the rest of the filtered fluid?

   • It returns to the blood
   • It is stored in the bladder for days
   • It goes to the large intestine with food waste
   • It is breathed out by the lungs
7. 6.

   Noah compares the two amounts on the kidney card. How much of the filtered fluid becomes urine?

   • No urine: it is made in the large intestine
   • About half, as the kidneys keep half
   • A small part, 1 to 2 of every 150 quarts
   • Each of the 150 quarts, as filtering makes urine
8. 7.

   Pia's kidney card says each kidney has about a million nephrons. What does each nephron do?

   • It filters blood and returns what the body needs
   • It takes in nutrients from food in the intestine
   • It stores urine until the bladder is ready
   • It removes carbon dioxide from the blood as a gas
9. 8.

   Ren says the stomach absorbs most of the nutrients from soup. Agree or disagree?

   • Disagree: most are absorbed in the small intestine
   • Agree: the stomach finishes digestion and absorbs the food
   • Agree: the soup soaks through the liver first
   • Disagree: most are absorbed in the large intestine
10. 9.

    Tala says a sandwich passes through the liver on its way to the intestines. Agree or disagree?

    • Disagree: the liver sends bile in through ducts
    • Disagree: it passes through the pancreas instead
    • Agree: the liver is part of the food tube
    • Agree: the stomach is too small to finish it
11. 10.

    Zee says digestion is finished by the time food leaves the stomach. Agree or disagree?

    • Disagree: the large intestine finishes it
    • Agree: the stomach's acid finishes the job
    • Disagree: the small intestine finishes it
    • Disagree: the liver finishes it as food passes through