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, esophagus, stomach, liver, small intestine
   • Mouth, esophagus, stomach, small intestine, blood
   • Mouth, windpipe, lungs, then the blood
   • Mouth, esophagus, stomach, large intestine, blood
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, large intestine, small intestine, out
   • Mouth, esophagus, stomach, small and large intestines, out
   • Mouth, esophagus, stomach, pancreas, then out
3. 3.

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

   • In the large intestine, with the water
   • In the small intestine, with juice from the pancreas
   • In the pancreas, after the beans pass into it
   • In the esophagus, on the way down
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: kidneys; urine: lungs; food leftovers: large intestine
   • Carbon dioxide: stomach; urine: kidneys; food leftovers: liver
   • Carbon dioxide: lungs; urine: large intestine; food leftovers: kidneys
5. 5.

   Luz drinks more water than usual at a game. How does the body get rid of the extra water?

   • The kidneys filter it from the blood into urine
   • The lungs turn it into carbon dioxide
   • The kidneys take it straight from the stomach
   • It stays in the blood with no way out

6. 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

7. 6.

   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 is stored in the bladder for days
   • It goes to the large intestine with food waste
   • It returns to the blood
   • It is breathed out by the lungs
8. 7.

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

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

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

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

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

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

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

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