Digestion and getting rid of waste

Grade 7 Science Worksheet

Circle the best answer.

1. 1.

   Ari's food path reads: mouth → esophagus → ? → small intestine. What fills the blank?

   • Stomach
   • Liver
   • Large intestine
   • Lungs
2. 2.

   Bo's food path reads: stomach → ? → large intestine. What fills the blank?

   • Pancreas
   • Small intestine
   • Kidneys
   • Esophagus
3. 3.

   Esme's food path reads: mouth → ? → stomach → small intestine. What fills the blank?

   • Small intestine
   • Windpipe
   • Gallbladder
   • Esophagus
4. 4.

   Jun reads that the liver helps digest fats. Does food pass through the liver on its way to the intestines?

   • No: the liver makes urine instead
   • No: bile flows in through ducts
   • Yes: food waits in the liver until bile is ready
   • Yes: food goes from the stomach into the liver
5. 5.

   Luz's pancreas makes a digestive juice during a meal of rice and beans. Where does the juice go?

   • Nowhere: the food comes to the pancreas
   • Into the large intestine to take in water
   • Through ducts into the small intestine
   • Into the kidneys to make urine
6. 6.

   Noah eats watermelon. After the small intestine, which organ takes in more water and makes the leftover waste solid?

   • The stomach
   • The bladder
   • The large intestine
   • The liver
7. 7.

   The small intestine's lining has millions of tiny finger-like villi. Why do the villi help Pia absorb nutrients from grapes?

   • They grind the grapes like teeth
   • They are not needed, as the stomach takes in most nutrients
   • They take in just water; the large intestine takes nutrients
   • They add surface, so more nutrients pass in
8. 8.

   During Ren's run, cells make wastes that travel in the blood. How do the kidneys remove them?

   • They breathe the waste out as a gas
   • They filter the blood and make urine
   • They send the waste back to the stomach
   • They take waste out of the small intestine
9. 9.

   Urine leaves one of Tala's kidneys. Where does it go next?

   • Into the large intestine with food leftovers
   • Down a ureter to the bladder
   • Back to the stomach
   • Up to the lungs to be breathed out
10. 10.

    Zee reads that the kidneys clean something all day long. What do they clean?

    • The blood
    • The food in the small intestine
    • The air in the lungs
    • The bile from the liver