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Simple Epithelium (#1, #2 and #3) - contains two types of pneumocytes resting on a thin basal lamina. Type I - flattened, simple squamous epithelial cells. Gas exchange occurs through these cells. Type II - dome-shaped, cuboidal epithelial cells that project into the lumen. Secrete surfactant that covers the alveolar surface and reduces surface ...
1 Μαΐ 2023 · The respiratory or gas-exchange region of the lung is composed of millions of alveoli, which are lined by an extremely thin, simple squamous epithelium that allows for the easy diffusion of oxygen and carbon dioxide.
Roaming around the alveolar wall is the alveolar macrophage, a phagocytic cell of the immune system that removes debris and pathogens that have reached the alveoli. The simple squamous epithelium formed by type I alveolar cells is attached to a thin, elastic basement membrane.
10 Οκτ 2022 · Lung Alveolus Structure – Lung Alveoli Anatomy . About 95% of the alveolar surface consists of simple squamous epithelial type I cells, and the remaining 5% is occupied by type II cells (or septal cells).
Alveoli are cup-shaped structures that open into alveolar sacs. The diameter of an alveolus is between 200 and 500 µm. Alveoli - extremely attenuated, simple squamous epithelium covering a fine mesh of capillaries; Alveolar Pores - adjacent alveoli are connected by small openings (10 µm diameter)
24 Φεβ 2023 · Roaming around the alveolar wall is the alveolar macrophage, a phagocytic cell of the immune system that removes debris and pathogens that have reached the alveoli. The simple squamous epithelium formed by type I alveolar cells is attached to a thin, elastic basement membrane.
28 Αυγ 2023 · Alveolar cells are often observed in biopsy samples using needle, transbronchial, thoracoscopic, or open techniques. H&E, trichrome, immunofluorescent, and carbon staining methods are useful in identifying specific pathologies within samples. Light and electron microscopy are also diagnostic options.
