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adenoids
lymphatic tissue in the nasopharynx; pharyngeal tissue
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alveolus (plural: alveoli)
Air sac in the lung
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apex of the lung
Tip or uppermost portion of the lung
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base of the lung
The lower portion of the lung
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bronchioles
The smallest branches of the bronchi
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bronchus (plural: bronchi)
The branch of the trachea (windpipe) that is a passageway into the lung; bronchial tube
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carbon dioxide (CO2)
Gas produced by body cells when oxygen and carbon atoms from food combine; exhaled through the lungs
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cilia
Thin hairs attached to mucous membrane epithelium lining the respiratory tract
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diaphragm
Muscle separating the chest and abdomen; contracts to pull air into lungs; relaxes to push air out
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epiglottis
Lid-like piece of cartilage that covers the larynx; keeps food from entering the larynx and trachea during swallowing
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expiration
Breathing out (exhalation)
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glottis
Slit-like opening to the larynx
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hilum (of lung)
Midline region where the bronchi, blood vessels, and nerves enter and exit the lungs
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inspiration
Breathing in (inhalation)
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larynx
Voicebox; contains the vocal cords
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mediastinum
The region between lungs in the chest cavity; contains the trachea, heart, lymph nodes, aorta, esophagus, and bronchial tubes
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nares
Openings through the nose carrying air into the nasal cavities
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oxygen (O2)
Gas that makes up 21% of air; passes into the bloodstream at the lungs and travels to all body cells
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palatine tonsil
One of a pair of almond-shaped masses of lymphatic tissue in the oropharynx
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paranasal sinus
One of the air cavities in the bones near the nose
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parietal pleura
Outer fold of pleura lying closer to the ribs and chest wall
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pharynx
The throat; including the nasopharynx, oropharynx, and laryngopharynx
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pleura
Double-folded membrane surrounding each lung
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pleural cavity
Space between the folds of the pleura
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pulmonary parenchyma
Essential parts of the lung, responsible for respiration; bronchioles and alveoli
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respiration
The process of moving air into and out of the lungs; breathing
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visceral pluera
Inner fold of pleura lying closer to the lung tissue
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alveol/o
alveolus, air sac
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bronchiol/o
bronchiole, small bronchus
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laryng/o
larynx, voice box
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pharyng/o
pharynx, throat
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pneum/o
pneumon/o
air, lung
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trache/o
trachea, windpipe
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-thorax
pleural cavity, chest
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alveol/o
alveolus, air sac, small sac
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laryng/o
larynx (voice box)
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pneum/o
pneumon/o
lung; air; gas
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trache/o
trachea (windpipe)
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-thorax
chest; pleural cavity
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