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Chapter 17

Respiratory System

alveolus air sac in the lungs
bronchi the two main branches leading form 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 larynx; closes during swallowing to direct food and liquids into the esophagus
glottis the opening between the vocal cords
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 ot 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 lipoportein 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
Created by: lindstromjPN110