This is a spread preparation of the mesenterium. The mesenterium is a thin serous membrane found in the peritoneal cavity of the abdomen. The mesenterium has two outer layers of mesothelium and an inner core of connective tissue. Because the specimen is a spread of the membrane on the slide and not a sectioned piece of tissue, the mesothelium is studied looking at the surface of the cells. This slide serves as an example of cells organized into a continuous layer with the cell borders clearly visible. By focusing up and down both mesothelial layers can be seen.
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