Bronchial Tree

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8 Terms

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bronchus

passageway that conducts air into the lungs.

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bronchioles

passageway that conducts air between a bronchus and alveolar duct; consists of terminal bronchioles & respiratory bronchioles

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alveolar duct

small passageway between a respiratory bronchiole and an alveolar sac

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alveolar sac

cluster of alveoli around an alveolar duct

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alveoli

hollow chambers where gas exchange takes place

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type 1 alveolar cells

simple squamous cells lining the alveoli; site of gas exchange

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type 2 alveolar cells

surfactant secreting cells inside alveoli; surfactant decreases the surface tension of water

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alveolar macrophages

large phagocytic cells that remove debris within the alveoli