1. Respiratory System
Respiratory System-set of organs that supply your body with oxygen and rid your body of carbon dioxide.
Breathing in and out are the basic actions of the respiratory system.
The respiratory system is a non-voluntary action.
You don’t have to think about it to make it work.

2. Respiratory System Parts of the Respiratory System
Mouth-passage for air to enter and exit the body.
Nose-other passage way for air.
Cilia-tiny hair-like projections that trap dirt and particles from the air. (filter)
Epiglottis-flap of tissue in back of mouth that covers the trachea, preventing food from entering it.

3. Respiratory System
Trachea-tube in the throat that takes air to and from the lungs.
Bronchi-two tubes that branch from the trachea to each lung.
Lungs-two large organs that exchange oxygen and carbon dioxide.
Diaphragm-muscle below lungs that expands and relaxes to produce breathing.

4. How Breathing Works Inhaling Diaphragm moves down.
Rib cage expands, making room in the chest.
Air rushes into the body, to the lungs.

5. How Breathing Works Inside the lungs
The bronchi divide into smaller passages called bronchioles.
Air passes through bronchioles into the alveoli which are surrounded by capillaries.
Oxygen moves into the bloodstream and carbon dioxide from the blood enters the alveoli.

6. How Breathing Works Exhaling Diaphragm pushes up.
Rib cage move in and down, forcing air out of the lungs.
Air with carbon dioxide move back through bronchioles and bronchi, up the trachea and out of the mouth and/or nose.

7. Problems Of The Respiratory System
Cold/flu
Pneumonia
Asthma
Tuberculosis
Emphysema
Lung cancer

8. Caring For Your Respiratory System
Don’t smoke
Avoid second hand smoke
Take care of your body if you have any respiratory illness.