Single-Layered Squamous Epithelium-Mesentery

Single-layered (simple) squamous epithelium consists of only one layer of cells. Simple squamous epithelium occurs in the lining of the blood and lymph vessels ( endothelium), of the heart ( endocardium ), the pleura and the peritoneal lumen ( serosa, mesothelium ). Squamous epithelial cells show a polygonal pattern when viewed from the top. Mesentery tissue, as shown in this picture, consists of flat layers of connective tissue and a layer of serous membranes at each side ( visceral peritoneum ). The epithelial cells of the serous tissue (mesothelium, peritoneal epithelium) are flat, polygonal cells with short microvilli, which form a single-layered epithelium. In this cuticle preparation, the cells look like pieces on a puzzle board. Silver impregnation has accentuate d the cell borders. The  borders from underlying cells in this cuticle preparation are visible through the top layer as gray, shadowy lines.

 Whole-mount preparation; stain: silver nitrate staining; magnification: × 300

References

Kuehnel, W.(2003). Color Atlas of Cytology, Histology, and Microscopic Anatomy. 4^th edition . Institute of Anatomy Universitätzu Luebeck Luebeck, Germany . Thieme Stuttgar t · New York .