1. Respiratory System
In Class Notes:

2. Function: (30.5)
The respiratory system provides oxygen for cells and removes the waste product, carbon dioxide ,from the body

3. Organs Involved: (30.5) Trachea Larynx Lungs Nasal Passage Pharynx
Tube between larynx and bronchi in which air travels to lungs
Larynx
Voice box
Lungs
Organ that house exchange of gases between the blood and air
Nasal Passage
Tube between naval cavity and the pharynx
Pharynx
Junction in the throat of the alimentary canal and the trachea
Bronchi
Two tubes leading from the trachea to the lungs
Bronchioles
Thin tubes branching from a bronchus within the lung
Alveoli
One of millions of tiny sacks where gas exchange occurs
Diaphragm
A sheet of muscle which controls the rate of breath
Epiglottis
Cover the trachea when you swallow

4. Sequence of breathing:
Inhaling
Air pressure inside lungs drops and air enters
Diaphragm contracts
Lungs are pulled down and they expand
Exhaling
Air is forced out of the lungs
Diaphragm relaxes
Lungs return to normal shape and contract

5. Diagram:

6. Parts you should know:

7. How does breathing work?
Diaphragm relaxes and contracts to fill and deflate the lungs.
A need for oxygen in the muscles causes your brain to crave air and breathing pace increases.

8. What does smoking do?
Fills the lungs with tar which clogs and destroys the lungs.

9. 3 Disorders
Chronic Bronchitis: Bronchi and bronchioles become irritated then inflamed making it hard to breathe.
Asthma: The heart rate increases and makes the bronchi hyperactive. This also makes it hard to breathe.
Respiratory Influenza: Lots of mucus clogs almost all passages of the respiratory system. Again this makes it hard to breathe.