Across
- 4. the element in which the gas exchange occurs
- 7. chemical substances found in food, build the human body
- 8. cell shape which resembles pavement
- 11. red/yellow bone ...
- 15. inactive form of fibrin
- 17. large tissue which supports the organs in the gut
- 18. a red blood cell
- 19. an eating disorder which starts with the letter "a"
- 20. respiratory control center
Down
- 1. the movement of air into and out of the lungs
- 2. a tube located in the beginning of the digestive track
- 3. a flap separating the trachea and the esophagus
- 5. a cell of which the alveoli wall is composed
- 6. the control center of heat management
- 9. tissue that contains fat cells
- 10. the process of bone growth
- 12. an essential amino acid which starts with the letter "a"
- 13. a part of the intestine, located in the beginning of the small intestine
- 14. liquid produced by the liver
- 16. matrix medium of the cell, can be liquid, solid, jellylike
