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Transpyloric Plane- Vertebral level and markers
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Vertebra Level = L1, marks pylorus of stomach as it enters duodenum, head and body of pancreas, transverse mesocolon, renal vessels and ureters, superior mesenteric artery branching from aorta.
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Subcostal Plane- Level and Markers
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Level: L3. Markers: Lower edge of costal margin, inferior mesenteric artery, 3rd part of duodenum
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Supracristal Plane- Level and Markers
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Level: L4. Markers: Highest point on iliac crests and bifurcation of aorta into common iliac arteries.
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Transtubercular Plane: Level and Markers
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Level: L5. Markers: Intersects Tubercles of iliac crest, common iliac veins join to form IVC.
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9 Abdominal Regions- Left to Right
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Right hypochondriac, epigastric, left hypochondriac, right lateral, umbilical, left lateral, right inguinal, hypogastric, left inguinal
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Mesenteries
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Double Layers of peritoneum formed by continuity of visceral and parietal peritoneum. Conduits for neurovasculature, tethers organs to body wall, allows organ mobility.
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Greater Omentum
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Attaches to greater curvature of stomach, extends to the transverse colon, the spleen, and the diaphragm. Encloses greater sac.
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Gastrocolic Ligament
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Attaches greater omentum to transverse colon
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Gastrosplenic Ligament
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Attaches greater omentum to the spleen
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Lesser Omentum
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Attaches to liver and extends to lesser curvature of stomach and the duodenum. Encloses the lesser sac or omental bursa.
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Epiploic Foramen
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Opening of lesser sac into greater sac. Located between hepatoduodenal ligament and PAW.
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Transverse Mesocolon
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Mesentery of transverse colon. Divides Abdominal cavity into 2 : supracolic and infracolic.
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Supracolic Compartment Contains...
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Stomach, biliary tree, liver, and spleen
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Infracolic Compartment contains...
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SI, ascending and descending colons. Split into right and left halves by the mesentery of the intestine.
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