|Abdomen between pages 4 and 5
||by perpetualplum on Flickr||
- Respiratory System is the system which supplies the body tissues with oxygen and gets rids of carbon dioxide.
- It is made up of the nasal cavity, trachea, bronchi, lungs, and diaphragm.
- The process of breathing in oxygen is called inhaling and breathing out carbon dioxide is called exhaling.
|From the Brockhaus and Efron Encyclopedic Dictionary
||by Double--M on Flickr||
|Nose and Nasal Cavity
- As you inhale air though your nose, small specks of dirt are trapped by many tiny hairs in your nose called cilia, this cleans the air.
- The hairs stop the dirt from going further in your body.
- The moist surface inside your nose traps even smaller pieces of dirt.
- The nasal cavity, the air passage behind the nose, plays an important role in breathing.
- The nasal cavity is divided into a right and left passageway.
- The tissue that covers the wall of your nasal cavity contains many blood vessels.
- Heat from the blood in the vessels helps warm the air as you breath.
- Moisture is added to the air you breath by special cells in the walls of the nasal cavity.
- The air is warmed and moistened before it reaches your lungs.
||by jetheriot on Flickr||
- The trachea (TRAY-kee-uh} is sometimes called the windpipe. The trachea filters the air we breathe and branches into the bronchi.
- The bronchi (BRAHN-ky) are two air tubes that branch off of the trachea and carry air directly into the lungs.