Respiratory System

Function of the Lungs  Supplies oxygen to the blood by inhaling. This oxygen is then carried to all the cells of the body.  Removes carbon dioxide (a waste gas) from the cells and release it outside the body. This is done when you exhale.

Facts about the lungs  In the cells the oxygen being delivered combines with nutrients to provide energy that the cells can use.  The carbon dioxide that you breathe out is absorbed by the plants and converted back into oxygen.

What makes up the respiratory system?  Trachea: Windpipe that directs air to the lungs  Bronchi: passages through which air enters the lungs  Alveoli: microscopic air sacs in the lungs which allow the exchange of O2 and Co2  Diaphragm: muscle that contracts and relaxes to allow the lungs to breathe.

Common Problems  Bronchitis: swelling of the bronchi caused by a virus or bacteria causing coughing, fever, and chest tightness.  Asthma: an inflammatory disease that causes the bronchi to become blocked or narrowed.  Pneumonia: is a lung infection caused by viruses or bacteria.

Common Cancers  Emphysema: a disease in which the alveoli are damaged or destroyed.  Lung Cancer: a disease in which tissues of the lung are destroyed by the growth of a tumor.

Caring for your lungs  Stay Active: regular activity strengthens your lungs and helps keep parts of the respiratory clear. It also strengthens your diaphragm.  Avoid smoking and secondhand smoke: All types of tobacco increase your risk of respiratory diseases.

Healthy Vs. sick