1. Respiratory System
In Class Notes:

2. Function: (30.5) Exchanges gasses between blood and air
Removes carbon dioxide
Allows us to speak (not a function per se)

3. Organs Involved: (30.5)
Nose and Mouth: air enters and is warmed and moisturized
Pharynx: the throat, passageway for air and food, contains epiglottis
Epiglottis: covers part of pharynx while you swallow (keeps food out of respiratory system)
Larynx: voice box, vibrate during exhale, allow speech
Trachea: windpipe, splits into bronchi
Bronchus(-i): end of pathway to lungs
Lungs: football-sized organs, filled with spongey tissue that exchanges oxygen and carbon dioxide
Bronchioles: branches of bronchi, like upside down trees
Alveoli: grape-like clusters at end of Bronchioles, air sacs that gather the oxygen

4. Sequence of breathing:
Diaphragm contracts, pressure increases, lungs fill
Air enters through mouth or nose
Passes through pharynx, larynx, and trachea
Enters the bronchi, bronchioles, and the alveoli
Alveoli gather oxygen and get rid of carbon dioxide
Diaphragm relaxes, lung pressure decreases, air rushes away

5. Diagram:
Here are all the parts: (find a diagram you like)

6. Parts you should know:
Can you find a blank one to practice labeling?

7. How is breathing regulated?
What organ controls it? Lungs/ diaphram
What causes increases and decreases in rates? Physical activity

8. What effects does smoking have on the respiratory system?
Tar from cigarettes coats inside of lungs
As tar builds up, there’s less lung capacity for oxygen
Less lung capacity= hard time breathing

9. Name at least 3 disorders & provide a description:
Bronchitis: infection of bronchial tubes (mucus forms inside of them, making breathing harder
Cancer
Lung: cancer form in the tissue of the lungs
Throat: cancerous tumors that develop in throat/ voice box
Emphysema: alveolar walls and capillary blood vessels are destroyed, limiting oxygen and CO2 transfer