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Unformatted text preview: : walls of alveoli together with pulmonary capillaries & their fused basal laminas (also known as air-blood barrier or alveolar-capillary membrane) type I cells : very thin simple squamous epithelium participate in gas exchange with pulmonary capillaries secrete angiotensin converting enzyme (ACE), which plays a role in blood pressure regulation type II cells : cuboidal cells scattered among the type I cells secrete a fluid containing surfactant that coats the alveolar walls o other features of alveoli : surrounded by fine elastic fibers alveolar pores connect adjacent alveoli (provide alternate air routes if alveoli collapse) alveolar macrophages (dust cells) along internal alveolar surfaces PAGE4...
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- Fall '10
- Anthropology, Pulmonary alveolus, respiratory tree, pulmonary capillaries, internal alveolar surfaces