1. Respiratory System
In Class Notes:

2. Function: (30.5) Provides oxygen for cells
Removes waste carbon dioxide from body
Keeps you alive

3. Organs Involved: (30.5) Pharynx- a chamber in upper throat
Epiglottis- flap of tissue that covers air pathway and prevents food and water from entering airway
Larynx- the voice box
Trachea- windpipe
Bronchi- air tubes that connect trachea to windpipe
Lungs- exchange CO2 and oxygen
Bronchioles- bronchus branches into smaller tubes (bronchioles)
Alveoli- cluster of air sacs at end of bronchioles
Diaphragm- sheet of muscle that expands and contracts as you inhale and exhale

4. Sequence of breathing:
Step 1: When you inhale, the diaphragm contracts and your chest expands
Step 2: Oxygen rushes into the lungs
Step 3: When you exhale, the diaphragm relaxes and your chest contracts
Step 4: Carbon dioxide rushes out of the lungs

5. Diagram:

6. Parts you should know nose mouth pharynx larynx trachea lung
Right bronchus
Left bronchus
bronchiole
alveoli
diaphragm

8. How is breathing regulated?
The Brain controls breathing involuntary
The level of carbon dioxide causes increases and decreases in rates. The CO2 dissolves in the plasma of your blood, then the brain regulates how much oxygen is needed.

9. What effects does smoking have on the respiratory system?
Destroys cilia
Increase risk for lung cancer
Emphysema – disease that causes the walls of the alveoli to lose flexibility
Increase risk for cardio vascular diseases
Nicotine addiction

10. Name at least 3 disorders & provide a description:
Asthma = Inflamation of te airways in the lungs, nose, and mouth. Makes breathing difficult.
asphyxia = when babies need help breathing at birth.
Tracheomalacia = When the walls of the airways are undeveloped.