How+we+breathe+wiki+page-+kat

=How do we breathe?= media type="file" key="biovideobreathingkatmcc.mov" We breathe because of our respiratory system!!
 * Through the respiratory system is made up of a **upper** and **lower tract**.
 * The **upper respiratory** **tract** includes the nasal cavities (nose and nostrils), pharynx, and larynx.
 * [[image:upper_respiratory_tract.jpg]]
 * Picture Source: http://www.pennhealth.com/health_info/asthma/images/19378.jpg
 * The **lower respiratory tract** includes the trachea, bronchial tree, and the lungs.
 * [[image:lower_respiratory_tract.jpg]]
 * Picture Source: http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/19379.jpg


 * Both respiratory tracts work together to make us breathe. We //**inhale**// through our nose and mouth to get //**oxygen**// which is carried to our lungs through the trachea (windpipe) and the bronchial tubes. We __**exhale**__ __**carbon dioxide**__, which is waste and our body doesn't need.
 * The bronchial tubes go into each lung, one main tube for each lung. The tubes then split into more and more branches of tubes that are called bronchioles. At the end of each tube there is a small sac called an **alveoli**. That is where the capillaries meet the air and get the oxygen your body needs. The blood in the capillaries also get rid of wastes such as carbon dioxide.
 * [[image:lungs-diaphragm.gif]]
 * Picture Source: http://kidshealth.org/kid/body/images_59265/1127505986415.internal_lungs260.gif
 * An important organ that helps us inhale and exhale is the **__DIAPHRAGM__**
 * When we inhale, our **diaphragm** //contracts//, which allows the air taken in by our nose and mouth to be sucked down into our trachea (windpipe), through the bronchial tree into our lungs.
 * When we exhale, our **diaphragm** //relaxes//, which pushes all of the air in our lungs out of our body releasing carbon dioxide.
 * A.[[image:diaph._and_lungs.JPG width="309" height="375"]] B. [[image:breathing.jpg]]
 * Picture Source A: http://www.dkimages.com/discover/previews/854/20116958.JPG
 * Picture Source B: http://www.kidsbiology.com/images/breathing.jpg

__**Script**__: how do we breathe? the respiratory system! the respiratory system is made up by the upper and lower tracts. the upper respiratory tract is from here to here, which includes the nasal cavity, the pharynx, and the larynx. the lower respiratory tract includes the trachea, also known as the windpipe, the bronchial tubes, and the lungs. Both respiratory tracts work together to make us breathe.

we inhale oxygen through our nose and mouth to get oxygen which is carried to our lungs through the trachea, and the bronchial tubes. we exhale carbon dioxide, which is waste our body doesn't need.

an important in the inhalation and exhalation process is the DIAPHRAGM! when we inhale, our diaphragm contracts which allows the air taken in by our nose and mouth to be sucked down into our lungs. when we exhale, our diaphragm relaxes, which pushes all of the air in our lungs out of our body.


 * Sources for information:
 * http://www.sk.lung.ca/content.cfm?edit_realword=hwbreathe
 * http://www.lung.ca/children/grades4_6/respiratory/how_we_breathe.html
 * Human Bio book