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