Type 1 and 2 pneumocytes of the lung (400X)

Pneumocytes.. Image copyright: University of Oslo, CC BY-NC-ND 4.0. (Tissue stain: H+E).

The epithelium of the alveoli is a single-layered epithelium with pneumocyte types 1 and 2. The alveolar macrophages lie on top of this epithelium. It is not possible to distinguish between pneumocyte type 1 and endothelial cells in this image (se arrow).

Published April 28th 2023, updated January 17th 2024.