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Chabner Chapter 12

The Respiratory System (Vocabulary)

TermDefinition
Adenoids Lymphatic tissue in the nasopharynx; pharyngeal tonsils.
Alveolus (plural: alveoli) Air sac in the lung.
Apex of the lung Tip or uppermost portion of the lung.
Base of the lung Lower portion of the lung.
Bronchioles Smallest branches of the bronchi. Terminal bronchioles lead to alveolar ducts.
Bronchus (plural: bronchi) Brance of the trachea (windpipe) that is a passageway into the lung; bronchial tube.
Carbon dioxide (CO2) Gas produced by body cells when oxygen and food combine; exhaled through the lungs.
Cilia Thin hairs attached to the mucous membrane epithelium lining the respiratory tract. They clear bacteria and foreign substances from the lung. Cigarette smoke impairs the function of cells.
Diaphragm Muscle separating the chest and abdomen. It contracts and releases to make breathing possible.
Epiglottis Lid-like piece of cartilage that covers the larynx, preventing food from entering the larynx and trachea during swallowing.
Expiration Breathing out (exhalation).
Glottis Slit-like opening to the larynx.
Hilum (of lung) Midline region where the bronchi, blood vessels, and nerves enter and exit the lungs.
Inspiration Breathing in (inhalation).
Larynx Voice box; containing vocal cords.
Lobe Division of a lung.
Mediastinum Region between the lungs in the chest cavity. It contains the trachea, heart, aorta, esophagus, and bronchial tubes.
Nares Openings through the nose carrying air into the nasal cavities.
Oxygen (O2) Gas that passes into the bloodstream at the lungs and travels to all body cells.
Palatine tonsil One of a pair of almond-shaped masses of lymphatic tissue in the oropharynx (palatine means pertaining to the roof of the mouth).
Paranasal sinus One of the air cavities in the bones near the nose.
Parietal pleura Outer fold of pleura lying closer to the ribs and chest wall.
Pharynx Throat; including the nasopharynx, oropharynx, and larynxopharynx.
Pleura Double-folded membrane surrounding each lung.
Pleural cavity Space between the folds of the pleura.
Pulmonary parenchyma Essential part of the lung, responsible for respiration; bronchiles and alveoli.
Respiration Process of moving air into and out of the lungs; breathing.
Trachea Windpipe.
Visceral pleura Inner fold of pleura lying closer to the lung tissue.
Created by: mrssmith0725