Across
- 1. Receives blood from all the parts of the body
- 4. The grape like clusters of air sacs in the lungs
- 5. The tube that connects the throat and bronchi (hint: Fork in the road)
- 7. What we breathe out
- 9. Keeps blood from flowing backwards
- 10. A type of blood cell that has no nucleus
- 12. Movement of the particles from an area of high concentration to low concentration
- 14. Always carries deoxygenated blood towards the heart
- 15. Receives blood from the lungs
- 16. The many little branches of respiratory system
Down
- 1. Pumps blood to the lungs
- 2. Contains hemoglobin which gives its red color
- 3. Small blood vessels with thin walls that are wrapped around alveolares
- 6. Always carries blood away from the heart
- 8. Pumps blood to all the parts of the body
- 10. 90% water 55% fluid 45% cells and 10% sugar, waste, and nutrients
- 11. The two large lightweight organs of the respiratory system
- 12. The large band of muscle that controls the size of the chest cavity (hint: at the bottom of the rib cage)
- 13. What we breathe in