lveolar walls is shown inFig. 274; lym])hatic \essels areabsent. Elastic tissue is highlydeveloped around the ah-eoli andforms rings encirchng their out-lets. In inspiration an aheolusmay expand to three times thediameter to which it returns dur-ing expiration (o.i to 0.3 mm.). Pores have been… … ..274. — LrOM a SECriCiN OF TUK LUNC; OF A Child, Injecceii tiiroliih ihe Pulmon.\ry.\RTER^*. ;■. So. < If the li\ c ahcoli drawn the three upjicr ones arelull) injected. Digitized by Microsoft® PLEURA. 243 manent apertures (stomata) in the epitheliurn probably do not exist. Theconnective tissue…
Histology · Microscopy
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