In the alveolar region of lungs:

Question

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srfactant-secreting cells form a continuous cytoplasmic layer lining the alveoli

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to barrier to diffusion of gases is about 10 u.m thick

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alveoli are larger in the upper and smaller in the lower zones of the lungs

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if any fluid scapes from capillaries

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it goes into the alveoli

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macrophages in the alveoli are carreied to the respiratory broncholes by the activity of cilia

Question #134800