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, liver, small intestine
   • 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, pancreas, then out
   • Mouth, esophagus, stomach, large intestine, small intestine, out
   • Mouth, esophagus, stomach, then out through the kidneys
   • Mouth, esophagus, stomach, small and large intestines, 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 pancreas, after the beans pass into it
   • In the small intestine, with juice from the pancreas
   • In the large intestine, with the water
4. 4.

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

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

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

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

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

   • It stores urine until the bladder is ready
   • It takes in nutrients from food in the intestine
   • It filters blood and returns what the body needs
   • 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?

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

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

    • Disagree: it passes through the pancreas instead
    • Agree: the liver is part of the food tube
    • Disagree: the liver sends bile in through ducts
    • 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
    • Disagree: the liver finishes it as food passes through
    • Agree: the stomach's acid finishes the job
    • Disagree: the small intestine finishes it