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Respiratory Sys

Chapter 17 definitions

TermDefinition
Alveolus Air sacs in the lungs
Bronchi The 2 main branches leading from the trachea to the lungs that serve as passageways for air
Bronchioles One of the smaller subdivisions of the bronchial tubes
Epiglottis The uppermost cartilage of the layrnx; closes during swallowing to direct food and liquids into the esophagus
Glottis The opening between the vocal cords
Hilum Opening on the lung's medial surface through which primary bronchi and pulmonary blood vessels pass
Intrapleural pressure The pressure between the visceral and parietal pleurae, which assists with lung expansion
Larynx Structure made of cartilage and muscle at the upper end of the trachea; part of the airway and the vocal apparatus
Palate Bony structure separating the mouth from the nasal cavity
Partial pressure The contribution of a single gas in a mixture of gases toward the total pressure of the gas mixture
Pharynx Muscular tube behind the oral and nasal cavities; commonly called the throat
Pleura Serous membrane covering the lungs and the thoracic cavity
Surfactant Lipoprotein secreted by alveolar cells that decreases surface tension of the fluid lining the alveoli, permitting expansion of alveoli
Tidal volume The amount of air inhaled and exhaled during quiet breathing
Trachea Portion of the respiratory tract that carries air through the neck and upper chest
Ventilation The movement of air into and out of the lungs
Vital capacity The amount of air that can be inhaled and exhaled with the deepest possible breath
Carina Cartilaginous ridge at the base of the trachea, where the 2 primary bronchi branch
Conchae 3 bones projecting from the lateral wall of each nasal cavity
Thyroid cartilage Largest piece of cartilage in the larynx; Adam's apple
Apneustic center Stimulates the inspiratory center to increase the length and depth of inspiration
Pneumotaxic center Inhibits both the apneustic center and the inspiratory center; contributes to a normal breathing rhythm and prevents overinflation of the lungs
Pneumothorax Collapsed lung
Inspiratory reserve volume The amount of air inhaled using maximum effort after a normal inspiration
Expiratory reserve volume The amount of air that can be exhaled after a normal expiration by using maximum effort
Residual volume The amount of air remaining in the lungs even after forced expiration
Created by: cbooher16
 

 



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