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The peritoneum is the serous membrane which lines the abdominal cavity. It is a type of loose connective tissue covered by mesothelium. Extensions of the peritoneum form the mesenteries that support the abdominal contents. It functions to lubricate abdominal viscera , enhance the immune response and wall off infection in the abdomen to prevent peritonitis.
 
The peritoneum is the serous membrane which lines the abdominal cavity. It is a type of loose connective tissue covered by mesothelium. Extensions of the peritoneum form the mesenteries that support the abdominal contents. It functions to lubricate abdominal viscera , enhance the immune response and wall off infection in the abdomen to prevent peritonitis.
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==Structure==
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==Structure & Histology==
 
*The peritoneum is smooth and clear in the healthy animal.
 
*The peritoneum is smooth and clear in the healthy animal.
*Single layer of [[Mesothelial cells|mesothelial cells]]
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*It consists of a thin layer of loose connective tissue covered by a single layer of [[Mesothelial cells|mesothelial cells]].
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**Mesothelial cells are simple squamous and of mesodermal origin.
 
*Many species have lymphoid tissue aggregates and fixed phagocytes in the omentum that are not covered by mesothelial cells
 
*Many species have lymphoid tissue aggregates and fixed phagocytes in the omentum that are not covered by mesothelial cells
 
*''NB Post mortem change and autolysis result in increased volumes of red-brown fluid in the abdomen, not associated with other pathology, no roughening of surfaces of organs or peritoneum.''
 
*''NB Post mortem change and autolysis result in increased volumes of red-brown fluid in the abdomen, not associated with other pathology, no roughening of surfaces of organs or peritoneum.''
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