呼吸系統(tǒng)--組織學(xué)和胚胎學(xué)(參考版)
2024-10-06 01:14本頁面
【正文】 Thank you 第三十一頁，共三十一頁。 Cap. Endothelium.。 No SMC**。 + +。 1. Mucosa=epithelium+lamina propria。 第三十頁，共三十一頁。 Alveolar epithelial cell shape cytoplasm functions Type I squamous Phagocytotic vesicle Covered 95% of the surface of alveoli to benefit gas exchange. Type II round cuboidal Osmiophilic multilamellar body Secret surfactant to reduce surface tension and stabilize the alveoli. Type I cell can not regenerate. Type II cell can differentiate into Type I cell . ** 第二十八頁，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。 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
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