Life Science Review

Edit Answers
1234567891011121314151617181920212223242526
Across
  1. 2. The 300 million alveoli in your lungs have a very large __ ___ in order to absorb a lot of oxygen into the bloodstream.
  2. 3. ___ reacts with oxygen to release ATP (energy).
  3. 6. ___ occurs when particles move from higher concentration to lower concentration.
  4. 8. The ___ _____ has a very large surface area to better absorb nutrients.
  5. 10. Nutrients are absorbed by these folds in the small intestine.
  6. 13. ___ are tiny sacs in the lungs that collect oxygen and transfer to the bloodstream.
  7. 15. ___ are structures in your mouth that mechanically break down food.
  8. 16. The ___ system transfers nutrients and oxygen to every cell in the body.
  9. 18. ___ is a type of diffusion that involves water moving across a membrane.
  10. 20. _____ speed up chemical reactions. An example includes amylase in your saliva.
  11. 21. ___ are tiny blood vessels that collect oxygen from the alveoli and nutrients from the villi.
  12. 22. ___ breaks fat into tiny globules so that it can be further broken down by enzymes.
  13. 24. ___ reacts with glucose to release ATP (energy).
  14. 25. Cilia and __ ___ filter pollutants from the air when you breathe.
  15. 26. ___ is a passageway for air that is made of cartilage to prevent it from collapsing.
Down
  1. 1. They ___ system takes in oxygen and outputs carbon dioxide.
  2. 4. ___ contains mucus and enzymes which chemically break down complex carbohydrates in the mouth.
  3. 5. The ___ system ingests, breaks down and absorbs nutrients.
  4. 7. ___ ____ is a chemical reaction where food and oxygen react to release usable energy for the body.
  5. 9. ___ is the flap that blocks your trachea when you swallow food.
  6. 11. After eating a cracker for several minutes you have noticed a change in taste. This is because the complex ___ are being broken down into glucose molecules.
  7. 12. This is the organelle (part of the cell) where cellular respiration takes place.
  8. 14. The ____ is a passageway for air in the respiratory system. It holds the vocal cords.
  9. 17. During cellular respiration ATP (energy), water and __ ___ are produced.
  10. 19. Hydrochloric acid and ____ chemically break down protein in the stomach.
  11. 23. Osmosis requires a ____ but diffusion does not.