【正文】
c Multilamellar bodies 第二十二頁,共三十一頁。 bloodair barrier 第二十三頁,共三十一頁。 Alveoli ? Type I cell ?squamous, covered most surface of the alveoli . ? Type II cell ? LM: round or cuboidal, cell body protrude into the lumen. ? EM: osmiophilic multilamellar body, with abundant phospholipids. ?Functions: secret surfactant, reduce surface tension, stabilize alveoli. 第二十四頁,共三十一頁。 ?Alveolar septum: continuous Cap., elastic fiber. macrophage dust C. bloodair barrier includes: layer on surface of alveoli I alveolar C of alveolar C layer of CT Cap. BM Cap. Endothelium. 第二十五頁,共三十一頁。 Terminal bronchiole Respiratory bronchiole Alveolar duct Alveolar sac 1 2 3 4 第二十六頁,共三十一頁。 Rules of structural variance in respiratory portion wall Epi. SMC Respiratory bronchiole Not integrated Alveoli open Simple columan Simple cuboidal thin Alveolar duct Many