Digestion and getting rid of waste

Grade 7 Science Worksheet - Building Confidence

Circle the best answer.

1. Read this first

   Use this

   not to scale. chews food; saliva starts breaking down starch; a muscle tube that pushes food to the stomach; mixes food with acid and juices; starts breaking down protein; finishes digestion; absorbs most nutrients into the blood; absorbs water; leftover waste leaves the body.

2. 1.

   In Bo's drawing, part X mixes food with acid and juices and starts breaking down protein. What is part X?

   • The pancreas
   • The small intestine
   • The mouth
   • The stomach
3. 2.

   In Esme's drawing, part Z absorbs water, and the leftover waste leaves the body. What is part Z?

   • The large intestine
   • A kidney
   • The esophagus
   • The small intestine
4. 3.

   Jun swallows a sip of water. What does the esophagus do?

   • Pushes food and drink to the stomach
   • Filters waste out of the blood
   • Absorbs most nutrients into the blood
   • Makes bile for breaking down fats
5. 4.

   Kira's snack has some fat in it. What does the liver do to help?

   • Holds the snack while it is digested
   • Absorbs water from leftover waste
   • Chews the snack into small pieces
   • Makes bile, which helps digest fats
6. 5.

   Luz eats a banana. What job does the stomach do with it?

   • Mixes it with acid and juices to start the breakdown
   • Pushes it down from the mouth
   • Finishes digestion and absorbs most of the nutrients
   • Takes in water and makes the leftovers solid

7. Use this

   Numbered food path, not to scale:

8. 6.

   Milo chews a carrot and swallows. Where does the food go right after the mouth?

   • The esophagus
   • The liver
   • The large intestine
   • The windpipe
9. 7.

   Pia's orange slice has just gone down the esophagus. Where does it go next?

   • The gallbladder
   • The small intestine
   • The stomach
   • The windpipe
10. 8.

    After a bike ride, Ren's cells have made carbon dioxide gas. Which organs remove it from the body?

    • The stomach
    • The lungs
    • The liver
    • The kidneys
11. 9.

    Tala drinks a full water bottle. Which organs filter wastes and extra water out of the blood?

    • The kidneys
    • The gallbladder
    • The lungs
    • The small intestine
12. 10.

    Part of Zee's pear skin can't be digested. Which organ sends these food leftovers out of the body?

    • The stomach
    • The large intestine
    • The kidneys
    • The lungs