1. THE RESPIRATORY SYSTEM
Exchanges oxygen and carbon dioxide between the blood, air & tissues

2. NOSE & MOUTH
Entryway for air

3. PHARYNX
Common pathway for food and air

4. EPIGLOTTIS
Flap that closes off the trachea when swallowing (prevents choking)

5. LARYNX
Voice box containing vocal cords

6. TRACHEA
Tube lined with cartilage rings (carries air to lungs)
trachea

7. BRONCHI & BRONCHIOLES Branch off from trachea into lung bronchioles

8. ALVEOLI
Grape-like air sacs responsible for exchanging gases with the blood

9. LUNGS Have large surface area for gas exchange HEALTHY LUNG
LUNG CANCER
EMPHYSEMA

10. DIAPHRAGM
Muscular sheet that contracts to bring air into & relaxes to push air out of the lung

11. NOSE
PHARYNX
MOUTH
EPIGLOTTIS
LARYNX
BRONCHIOLES
TRACHEA
ALVEOLI
LUNGS
DIAPHRAGM
BRONCHI

12. Mechanisms of Breathing
Inhalation Exhalation
Air out
Air in
Ribs fall
Ribs
rise
Diaphragm
Mechanisms of Breathing

14. ASTHMA
narrowing of bronchial tubes and swelling of the mucous membranes. (allergy-related)

15. Alveoli loose their elasticity5.
Alveoli loose their elasticity
(stay filled w/air after exhaling)

16. Diseases caused by smoking:

17. The 411 on Tobacco 1. Ingredients - cyanide - carbon monoxide
- nicotine (addictive drug that stimulates nervous system)

18. In regular respiration, O2 (oxygen) hooks onto hemoglobin in the blood & is transported to the body.
When smoke is inhaled, O2 is replaced by CO – carbon monoxide (which is toxic).