The Lungs 

Did you know?  Thank's to the Respiratory system you breathe every day. Your lungs expand and contrast, supplying life-sustaining oxygen to your body and removing from it, a waste product called carbon dioxide. In the lung there is a Trachea, a right lung and a left lung. There is bronchial tubes that pass through the lungs, they divide into small air passages called bronchitis. The lungs are found in the chest on the right and left side. And in the front the lungs expand from above the clavicle or known as collarbone at the top of the like right at the middle of the ribs. At the back of the chest the lungs finish around the tenth rib. The pleura or also known by the protective membranes which cover the lungs continue down to the twelfth rib. From front to the back the lungs fill the rib cage, but they are separated by the heart, and they are separated by it because the heart relies between the two lungs. The lungs main function is to help oxygen from the air we breathe enter red blood cells. Red blood cells then carry oxygen around the body to be used in the cells found in our organs and tissues. The lungs also help the body to get rid of coz gas whenever we breathe  out. There are a number of other jobs carried at by the lungs that include:
1. Changing the ph of the blood by increasing or decreasing the amount of coz in the body.
2. Filtering out small gas bubbles that may occur in the bloodstream.
3. Filtering out small blood dots formed in veins
4. Converting a chemical in the blood called 
Disorders of the Lungs:
1. asthma 
2. bronchial disease
3. bronchitis 
4. cancer of the lung by smoking
MLA Format Citation:
WebMD. "How the Lungs and Respiratory System Work." WebMD. 2005.  . 2005-2014. <www.m.webmd.com/a-to-zguides/how-we-breathe>.
Dr Tim Kenny Dr Beverley Kenny. "The Lungs and Respiratory Tract." Patient.co.uk. 1997.  PiP (Patient Information Publications). December 2002.