The Peritoneum Flashcards
what is the peritoneum?
a very thin, semi-permeable serous membrane that lines the walls of the abdominopelvic cavity and covers the abdominal organs
what does the peritoneum support and provide a pathway for?
supports viscera
pathway for blood vessels and lymph
what are the 2 continuous layers of the peritoneum?
parietal peritoneum
visceral peritoneum
what are both layers of the peritoneum composed of
simple squamous epithelium - mesothelium
what does the parietal peritoneum line?
the internal abdominopelvic wall
why is pain in the parietal peritoneum localised?
because it has the same nerve supply as the part of the abdominal cavity it lines
what does the visceral peritoneum cover?
it invaginate and covers most of the abdominal viscera
why is visceral peritoneum pain poorly localised?
it has the same autonomic nerve supply as the viscera
the pain is referred to areas of the skin (dermatomes) that are supplied by the sae same sensory ganglia and spinal cord segments as the nerve fibres innervating the viscera
what is the peritoneal cavity?
a potential space between the parietal and visceral peritoneum
what does the peritoneal cavity normally contain?
a small amount of lubricating fluid
what does intraperitoneal mean?
the visceral peritoneum covers the organ both anteriorly and posteriorly - enveloped
what are intraperitoneal organs?
stomach
spleen
liver
first and fourth parts of duodenum
jejunum
ileum
transverse colon
sigmoid colon
what does retroperitoneal mean?
there is no association with the visceral peritoneum and the parietal peritoneum only covers the anterior surface
what are examples of retroperitoneal organs?
rectum
oesophagus
ascending colon
descending colon
kidneys
what is mesentery?
a double layer of visceral peritoneum
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