Science Review Puzzle

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Across
  1. 2. a group of naturally occurring molecules that include fats, waxes, sterols, and vitamins
  2. 4. biological molecules responsible for the thousands of chemical inter-conversions that sustain life
  3. 5. a bodily function that filters, warms, and humidifies air before it continues in the respiratory system
  4. 10. diffusion with water only
  5. 12. the movement of substances from an area of high concentration to an area of low concentration
  6. 13. carries food from the pharynx to the stomach
  7. 14. first 25 centimeters of the small intestine
Down
  1. 1. chemical reactions that release energy from food
  2. 3. Muscle tissue located underneath your lungs
  3. 6. sacs in the lungs that exchange oxygen for carbon dioxide
  4. 7. starts to break proteins down in the stomach
  5. 8. a type of membrane that lines the interior of the digestive system
  6. 9. branches that bring air into the inner part of the lungs
  7. 11. crushes food and mixes it with saliva