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Mesothelium

   

Workbook tasks

Slide 3: Simple squamous epithelium (mesothelium)

Silver nitrate & HE

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.

Identify:

  1. Cell borders.
  2. Shape of the cells.

  3. Large lightly stained nuclei.

  4. (Connective tissue cell nuclei are discussed later under connective tissue).

Draw and annotate:

A surface view of a few cells and their nuclei indicating the shape of the cells by means of their borders:

 

Reflection:
  1. How do the cell borders appear?
  2. How do we know these cells are thin?
  3. Describe serous membranes and explain its function.
 

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Caribbean reef squid

2018


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© februarie 2008 marius loots