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General Introductory Topics
Published in Vadim Backman, Adam Wax, Hao F. Zhang, A Laboratory Manual in Biophotonics, 2018
Vadim Backman, Adam Wax, Hao F. Zhang
Simple squamous epithelium is the thinnest type of epithelium and is only 1–2 μm thick. The surface cells of the squamous stratified type are just as thin but can be quite large in the transverse plane, approaching 50 μm or even greater in diameter. They do look like pancakes! The cells located at the bottom of a squamous stratified layer are more similar to cuboidal cells in terms of their shape. The overall thickness of the squamous stratified epithelium can be anywhere from 0.5 to 1 mm thick. Simple columnar cells are approximately 20 μm tall and 10 μm wide. However, one should remember that simple columnar epithelium is rarely a flat layer. Instead, it frequently forms three-dimensional folding and invaginating structures such as crypts in the intestines, with the thickness ranging from 200 to 600 μm. Finally, thickness of transitional and pseudostratified epithelia is on the order of 500 μm.
Impact of untreated and Sargassum wightii-treated brilliant green dye exposure on Indian major carp, Labeo rohita Ham.: hematology, biochemistry, enzymology and histopathology
Published in International Journal of Phytoremediation, 2020
D. Vigneshpriya, N. Krishnaveni, S. Renganathan, R. Sri Sakthi Priyadarshini
Figure 2 shows the morphological section of gill of fishes exposed to control group showed the normal structure in which primary and secondary gill lamellae and a prominent branchial simple squamous epithelium composed of non-differential cells. The fishes exposed to treated BG dye showed regenerating respiratory epithelium of the gills. Fishes in untreated BG dye showed mucous secretion on gill region, degenerated central axis, erosion of the secondary lamellae, fusion of adjacent secondary gill lamellae and necrosis in the primary lamellae, degeneration of epithelium, necrosis and curling of secondary lamellae were noticed.