Findings

A single layer of squamous epithelial cells over a small amount of loose connective tissue constitutes the visceral pleura which covers the lung parenchyma. The parenchyma of the lung consists of alveolar septa and spaces as well as the conducting portions of the airways and blood vessels.

Comment

Squamous epithelial cells appear flat when sectioned perpendicularly.

Preparation

Paraffin section, hematoxylin and eosin

View

High-power light microscopy

Specimen

Lung pleura

Image Credit

Katsumi M. Miyai, M.D., Ph.D
Department of Pathology
School of Medicine
University of California, San Diego