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Chabner's Language of Medicine 9th edition. Key vocabulary words for Chapter 12- the respiratory system.


lymphatic tissue in the nasopharynx; pharyngeal tonsils


air sac in the lung

apex of the lung

tip or uppermost portion of the lung. An apex is the tip of a structure.

base of the lung

Lower portion of the lung


smallest branches of the bronchi. Terminal bronchioles lead to alveolar ducts.


branch of the trachea (windpipe) that is a passageway into the lung; bronchial tube.

carbon dioxide

gas produced by body cells when oxygen and food combine; exhaled through the lungs.


thin hairs attached to the mucous membrane epithelium lining the respiratory tract. They clear bacteria and foreign substances from the lung.


muscle separating the chest and abdomen. It contracts and relaxes to make breathing possible.


lid-like piece of cartilage that covers the larnyx, preventing food from entering the larynx and trachea during swallowing.


breathing out; exhalation


midline region where bronchi, blood vessels, and nerves enter and exit the lungs


breathing in (inhalation)


voicebox; containing the vocal cords


region between the lungs in the chest cavity. It contains the trachea, heart, aorta, esophagus, and bronchial tubes.


openings through the nose carrying air into the nasal cavities


gas that passes into the bloodstream at the lungs and travels to all the body cells.

palatine tonsil

one pair of almond-shaped masses of lymphatic tissue in the oropharynx.

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


throat; including the nasopharynx, oropharynx, and laryngopharynx


double-folded membrane surrounding each lung

pleural cavity

space between the folds of the pleura

pulmonary parenchyma

essential parts of the lung, responsible for respiration; bronchioles and alveoli


process of moving air into and out of the lungs; breathing



visceral pleura

inner fold of pleura lying closer to the lung tissue


division of a lung

External respiration

The exchange of gases in the lung

Internal respiration

The exchange of gases in the tissue cells

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