Respiratory System

2. something we do every day if we are alive
6. capacity the highest amount of air we can breathe into our lungs
10. volume the amount of air breathed in and out with each breath
11. involved with the mechanics of breathing, located between the ribs
14. where the respiratory system begins
15. appear like tree limbs that deliver air to the alveoli
16. these always move from an area of high concentration/pressure to an area with low concentration/pressure
17. the main muscle that contributes to respiration
18. lung capacity the highest amount of air plus more
19. sometimes known as the voicebox
20. sometimes referred to as the ' highways for gas exchange'.

1. crucial for life and located in the atmosphere
3. the pressure in the lungs is higher and the chest cavity gets smaller
4. surrounds Earth
5. refers to the exchange between respiration and the environment
7. where the process of gas exchange occurs
8. in tiny clusters throughout the lungs, that exchange oxygen and carbon dioxide to the bloodstream
9. possess 20 rings of cartilage so it can widen with each breath
12. happens when you meet an influential person, or when a persons chest cavity gets bigger
13. this is shared with the digestive system