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 * LUNGS- are the main organs in the respiratory system. Oxygen is taken into the lungs and carbon dioxide is taken out. Red blood cells pick up oxygen in the lungs and take the oxygen to all the body cells that are needing it at the time. The blood cells take the carbon dioxide which is a waste of gas. **


 * Trachea- **A common biological term for an airway through which respiratory air transport takes place in organisms.

Another name for the trachea is the windpipe. It is a bony tube that connects the nose to the mouth and then to the lungs. It is located in the front of the neck.




 * Tracheal Stenosis-Tracheal Stenosis is a narrowing or constriction of the trachea. Most Trachea Stenosis develop when you injure your trachea. Trachea Stenosis can also occur from other causes, including external injury to the throat****. Other diseases of the Trachea. Diffused Trachea, Focal Disease, airway obstruction, Fistula, Tracheal Collapse, Tracheotomy, and Tracheomalacia.**


 * Emphysema- A disease in which** **the air sacs, where gases are exchanges, are damaged by chronic inflammation. As the air sacs damage they begin to form together. This doesn't allow good exchange of gases from the lungs to the blood. Cigarette's are the most common cause of Emphysema. Other diseases of the lungs are asthma, acute bronchitis, chronic obstructive bronchitis, cystic fibrosis, and pneumonia.**