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Terminology of Pulmonology

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Term
Definition
Alveolus (pl. alveoli)   a hollow sphere of cells that expands and contracts with each breath  
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Ambu bag   a hand-held device that is used to manually breathe for the patient on a temporary basis  
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Anoxic   a patient with a complete lack of oxygen in the arterial blood and body tissues  
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Apex   the rounded top of each lung  
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Asphyxia   an abnormally high level of carbon dioxide and an abnormally low level of oxygen  
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Asthma   hyperactivity of the bronchi and bronchioles with bronchospasm  
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Atelectatic   incomplete expansion of collapse of part or all of a lung due to mucus, tumor, trauma or a foreign body that blocks the bronchus  
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Bronchus (pl. bronchi)   either of the two primary divisions of the trachea that lead respectively into the lungs  
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Cancer   any type of malignant growth or tumor, caused by abnormal and uncontrolled cell division  
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Cannula   a small tube for insertion into a body cavity, duct, or vessel  
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Carbon dioxide   a colorless, odorless, incombustible gas formed during respiration and organic decomposition  
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Cilia   small hairs that flow in coordinated waves to move mucus and trapped particles toward the throat  
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Concha (pl. conchae)   any of various structures, such as the external ear, that resemble a shell in shape.  
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Diaphragm   a sheet of skeletal muscle, lies along the inferior border of the thoracic cavity  
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Edema   fluid collection in tissue  
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Embolus   a blood clot or fat globule in the circulatory system  
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Epiglottis   a lid-like structure  
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Heimlich maneuver   procedure to assist a choking victim with an airway obstruction  
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Hilum (pl. hila)   an indentation on the medial surface of the lung where a bronchus enters the lung  
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Hypoxic   very low level of oxygen in the cells  
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Influenza   acute viral infection of the upper and lower respiratory system with fever, aches and a cough  
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Larynx   voice box  
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Legionnaire’s disease   severe, sometimes fatal, bacterial infection with flu-like symptoms, aches and fever  
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Legionella pneumophilia   bacteria responsible for Legionnaire’s disease  
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Lobe   large divisions of the lung, whose dividing lines are visible on the outer surface of the lung  
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Lumen   the cavity of a tubular organ or part, as in lumen of a blood vessel  
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Mantoux   test to determine if a patient has been exposed to tuberculosis  
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Mediastinum   an irregularly shaped area that contains the trachea, heart and esophagus  
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Mucosa   a mucous membrane that humidifies the air and produces mucus  
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Oxygen   an element, normally a gas, that makes up about one-fifth of the atmosphere of the Earth  
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Parenchyma   the functional part of the lung  
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Pharynx   throat  
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Pleura   the thin serous membrane that envelops each lung and folds back to make a lining for the chest cavity  
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Pneumocystis jiroveci   a fungus causing severe pneumonia  
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Rales   irregular crackling or bubbling sounds during inspiration  
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Rhonchi   humming, whistling, or snoring sounds during inspiration or expiration  
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Reye’s syndrome   vomiting, seizures, liver failure, sometimes fatal condition from the use of aspirin to treat the flu  
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Septum   lung membrane  
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Sputum   mucus production  
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Status asthmaticus   a prolonged, extremely severe, life-threatening asthma attack  
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Stridor   high-pitched, harsh, crowing sound due to edema or obstruction in the trachea or larynx  
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surfactant   a protein-fat compound that reduces surface tension and keeps the walls of the alveolus from collapsing with each exhalation.  
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Thorax   a bony cage that consists of the sternum, the ribs and spinal column  
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Trachea   windpipe  
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Wheezes   high-pitched whistling or squeaking sounds during inspiration or expiration  
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