Unit 2: Crossword 1

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Across
  1. 4. food travels through the...
  2. 6. a small opening in the plant that allows carbon dioxide and oxygen to move into or out of the leaf
  3. 9. moves out of the stomata
  4. 10. carries water from the roots to the stem and leaves
  5. 11. transport blood back to your heart
  6. 13. a large muscle below the lungs that contracts and relaxes as air moves into and out of your lungs
  7. 16. the body system responsible for gas exchange
Down
  1. 1. the main organ in the respiratory system
  2. 2. an organ that acts as a pump for your circulatory system
  3. 3. carries dissolved sugars(food) throughout the plant
  4. 5. the two narrower tubes that lead into the lungs
  5. 7. where gas exchange occurs in the lungs
  6. 8. are very tiny blood vessels that enable oxygen, carbon dioxide, and nutrients to diffuse to your cells
  7. 12. carry blood away from the heart
  8. 14. a tube like passageway at the top of the throat that receives air, food, and liquids from the mouth or nose
  9. 15. air travels through the…