peritoneum, blood supply and innervation of the abdomen

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no slide title peritoneum, blood supply and innervation of the abdomen peritoneum peritoneum is a serous membrane that lines the internal wall of the abdominal cavity and covers intraperitoneal viscera peritoneum consists of: parietal layer visceral layer mesenteries omenta ligaments mesenteries, omenta & ligaments are double or quadriple (omenta) layers of visceral peritoneum that connect body wall to viscera or connect viscera to viscera and/or convey blood vessels, lymphatics & nerves n.b.: there is a peritoneal cavity b/n the parietal & visceral layers, containing a small amount of peritoneal fluid that lubricates adjacent surfaces of the visceral & parietal layers peritoneal cavity intra- and extra-peritoneal organs intraperitoneal organs: are covered by visceral peritoneum each intraperitoneal organ invaginates into the visceral peritoneum during development e.g., stomach, liver, spleen, jejunum, ileum, appendix vermiformis, transverse & sigmoid colon, proximal 2cm of duodenum, tail of pancreas as a result of covering by visceral peritoneum, …

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aches the stomach to the diaphragm (by gastrophrenic ligament) and to the spleen (by gastrosplenic ligament) vessels enclosed by the greater omentum are: short gastric and left & right gastro-omental (gastroepiploic) vessels function of the greater omentum: it isolates infection (policeman of the abdomen) it encloses (protects) vessels gastrophrenic lig. gastrospenic lig. greater omentum attaches stomach to diaphragm, spleen & transverse colon lesser omentum lesser omentum is a double fold of visceral peritoneum that passes from the liver to the lesser curvature of the stomach and the 1st part of the duodenum it has two parts: hepatogastric ligament hepatoduodenal ligament the hepatogastric ligament: passes from the groove for ligamentum venosum of the liver to the lesser curvature of the stomach. it encloses the right & left gastric vessels the hepatoduodenal ligament: passes b/n porta hepatis of the liver & 1st part of duodenum it forms the free anterior border of …

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reater sacs: lesser sac (omental bursa) shown in blue color: is a space that lies posterior to the stomach double layer of peritoneum seals off communication b/n greater & lesser sacs lesser sac has: superior recess inferior recess lesser sac provides a dead space for the stomach allowing it to expand when filled with food/drinks omental (epiploic) foramen inferior recess of the lesser sac lateral view of abdominal cavity p a a p lesser sac con’t lesser sac: communicates with greater sac anteriorly through the omental (epiploic) foramen foramen is bounded by: anteriorly: free edge of the lesser omentum with its contents (portal triad, ln & vessels, and nerve plexus) posteriorly: ivc & right crus of diaphragm superiorly: caudate lobe of the liver inferiorly: 1st part of duodenum & the portal triad ha = hepatic artery pv = portal vein bd = bile duct portal triad omental foramen splenogastric ligament …

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ateral to ascending & descending colon paracolic gutter of small intestine hepatorenal recess: (morison’s pouch) a deep pouch of peritoneal cavity between the rt. lobe of the liver and the right kidney & right suprarenal gland it communicates with the right subphrenic recess subphrenic recesses: right & left subphrenic recesses lie b/n the inferior surface of the diaphragm & the diaphragmatic surface of the liver the right & left subphrenic recesses are separated by the falciform ligament recesses of the peritoneal cavity: hepatorenal recess rt & lt subphrenic recesses nerve supply of the peritoneum parietal peritoneum is innervated: segmentally by spinal nerves (somatic) that innervate the overlying muscles of the anterolateral abdominal wall thus, pain is well localized (somatic innervation) visceral peritoneum is innervated by: autonomic nervous system (ans) thus, no general sensation blood supply to abdominal viscera (foregut) (midgut) (hindgut) blood supply of the abdominal viscera is dependant on …

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c pancreas, jejunum, artery nerve (t10-11) ileum, cecum, appendix, (up to junction of + vagus ascending colon, rt. 2/3 rt. 2/3 & lt. 1/3 of of transverse colon transverse colon) hindgut left 1/3 of transverse inferior lumbar colon, descending mesenteric splanchnic and sigmoid artery nerves (l1-2) colons, rectum, (up to upper ½ of and upper1/2 of anal canal anal canal) pelvic splanchnic nerve (s2-4) biliary apparatus includes: the hepatic ducts, gallbladder, cystic duct and bile duct autonomic innervation of the abdomen l1- l2 parasympathetic innervation of the abdomen anterior & posterior vegal trunks (10th cranial nerve) for derivatives of the foregut and midgut pelvic splanchnic nerve (s2-s4) for derivatives of the hindgut and for viscera of the pelvic cavity thank you !!! image1.png image2.emf image3.emf image4.emf image5.jpeg image6.png image7.emf image8.emf image9.emf image10.jpeg image11.jpeg image17.emf image12.png image13.emf image14.emf image15.emf image16.emf image15.png image18.emf image19.jpeg image20.png image21.emf image23.emf image29.emf image30.emf image31.emf image32.emf image22.png …

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no slide title peritoneum, blood supply and innervation of the abdomen peritoneum peritoneum is a serous membrane that lines the internal wall of the abdominal cavity and covers intraperitoneal viscera peritoneum consists of: parietal layer visceral layer mesenteries omenta ligaments mesenteries, omenta & ligaments are double or quadriple (omenta) layers of visceral peritoneum that connect body wall to viscera or connect viscera to viscera and/or convey blood vessels, lymphatics & nerves n.b.: there is a peritoneal cavity b/n the parietal & visceral layers, containing a small amount of peritoneal fluid that lubricates adjacent surfaces of the visceral & parietal layers peritoneal cavity intra- and extra-peritoneal organs intraperitoneal organs: are covered by visceral peritoneum each intra...

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