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72 terms

Peritoneal Cavity and Intestines

Anatomy Terms for U of Cincinnati
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Parietal Peritoneum
Lines inner surfaces of the abdominal and pelvic walls
Visceral Peritoneum
Covers the surfaces of the abdominal and pelvic organs
Peritoneal Cavity
Potential space between the two types of peritoneum
Intraperitoneal Organs
Stomach, Small Intestine, Liver, and Spleen
Retroperitoneal Organs
Ureterus, Suprarenal Glands, and Kidneys
Secondarily Retroperitoneal Organs
Duodenum, Pancreas, Ascending and Descending Colon
Liver Location
Right Upper Quadrant, extends across midline to left upper quadrant. Inferior to Diaphragm. Intraperitoneal
Falciform Ligament
Divides liver into right and left anatomical Lobes. Passes from the Parietal Peritoneum on Anterior Abdominal wall to Visceral Peritoneum on surface of Liver. Part of the Coronary Ligament.
Gallbladder Location
Right Upper Quadrant. Extends below inferior border of Liver. Tip of ninth Costal Cartilage at mid-clavicular line. Intraperitoneal
Stomach Location
Left Upper Quadrant. Anterior partially covered by Liver. Intraperitoneal
Spleen Location
Left Upper Quadrant. Posterior to Stomach. Intraperitoneal
Greater Omentum
Attached to the greater curvature of the stomach
Three parts of the Small Intestine
Duodenum, Jejunum, and Ileum
Greater Curvature of the Stomach
Outside Curve (larger circumference)
Duodenum
Secondarily Retroperitoneal
Jejunum and Ileum Location
Extend from Left Upper Quadrant to Right Lower Quadrant. However occupy all four quadrants. Intraperitoneal
Ileocecal Junction
Junction between the Colon and Ileum
Cecum Location
Right Lower Quadrant. Secondarily Retroperitoneal
Appendix Location
Right Lower Quadrant attached to Cecum. Secondarily Retroperitoneal
Ascending Colon Location
Extends from Right Lower Quadrant to Right Upper Quadrant. Ends at the Right Colic (hepatic) flexure. Secondarily Retroperitoneal
Transverse Colon Location
Extends from Right Upper Quadrant to Left Upper Quadrant. Ends at Left colic (Splenic) Flexure. Intraperitoneal
Descending Colon Location
Extends from Left Upper Quadrant to Left Lower Quadrant. Secondarily Retroperitoneal
Sigmoid Colon Location
Left Lower Quadrant. Ends in the Pelvic Cavity at the third sacral Vertebra. Intraperitoneal
Rectum Location
Inside Pelvic Cavity
Lesser Omentum Location
Passes from Lesser Curvature of the Stomach and First Part of the Duodenum to Inferior Surface of Liver. Has two parts: Hepatogastric Ligament and Hepatoduodenal ligament
Hepatogastric Ligament
Part of the Lesser Omentum, extends from the Liver to the Lesser Curvature of the Stomach
Hepatoduodenal Ligament
Part of the Lesser Omentum, extends from the Liver to the First Part of the Duodenum
Round Ligament of the Liver
Obliterated Umbilical Vein. Inferior free margin of the Falciform Ligament
Ligamentum Teres Hepatis
Round Ligament of the Liver
Coronary Ligament
Attaches Liver to Diaphragm. Made of three parts: Falciform Ligament, Left Triangular Ligament, and Right Triangular Ligament.
Left Triangular Ligament
Part of the Coronary Ligament. Between the Left Lobe of Liver and Diaphragm
Right Triangular Ligament
Part of the Coronary Ligament. Between the Right Lobe of Liver and Diaphragm
Transverse Mesocolon
Attaches the transverse colon to the posterior abdominal wall.
Phrenicocolic Ligament
Attaches Left Colic Flexure to Diaphragm. End of the Transverse Mesocolon
Mesentery of the Small Intestines
Suspends the Jejunum and Ileum from the posterior abdominal wall. 6 m long.
Root of the Mesentery
Part of the Mesentery of the Small Intestines. Attaches to the posterior abdominal wall from the Left Upper Quadrant to the Right Lower Quadrant. 15 cm long.
Mesoappendix
Attaches the appendix to the posterior abdominal wall. Contains the appendicular artery
Appendicular Artery
Artery supply to the Appendix. Contained in the mesoapendix.
Sigmoid Mesocolon
Lower Left Quadrant. Suspends sigmoid colon from the posterior abdominal wall.
Greater Peritoneal Sac
Part of the Peritoneal Cavity. Contains the greater portion of Intraperitoneal organs, including Jejunum, Ileum, Transverse Colon, Sigmoid Colon, and Appendix
Lesser Peritoneal Sac
Part of the Peritoneal Cavity. Doesn't really surround any organs, but rather sits posterior to the stomach and liver assisting the greater peritoneal sac to surround these organs with peritoneum. Anterior to the Pancreas (forming the posterior wall of the sac).
Omental Bursa
Lesser Peritoneal Sac
Omental Foramen
Connects Greater and Lesser Peritoneal Sacs. Posterior to the Hepatoduodenal Ligament.
Epiploic Foramen
Omental Foramen
Omental Foramen Boundaries
Anterior: Hepatic Portal Vein, Heaptic Artery ProperHepatoduodenal Ligament
Posterior: Inferior Vena Cava, Right Crus of Diaphragm, and Parietal Peritoneum
Superior: Caudate Lobe of the Liver covered with Visceral Peritoneum
Inferior: First Part of the Duodenum covered with Visceral Peritoneum
Superior Recess
Highest part of the Lesser Peritoneal Sac. Diaphragm lies Posterior and Caudate Lobe of the Liver is Anterior
Jejunum
Proximal 2/5ths of Intraperitoneal Small Intestine. Thicker than Ileum.
Ileum
Distal 3/5ths of Intraperitoneal Small Intestine
Duodenojejunal Junction
Junction between the Duodenum and the Jejunum
Suspensory Ligament of the Duodenum
fibromuscular ligament arising from the Right Crus of the Diaphragm, anchoring the Duodenojejunal Ligament.
Superior Mesenteric Artery
Arises from the Anterior surface of the Abdominal Aorta 1 cm inferior to the Celiac Trunk. Level of the L1 Vertebra. Starts Posterior to the Pancreas, then passes Anterior the Pancreas, third part of the Duodenum, and Left Renal Vein. Upon entering the mesentery of the small intestine, follows path of jejunum and ileum.
Inferior Pancreaticoduodenal Artery
First branch of the Superior Mesenteric Artery. Runs superiorly and to the right to supply the duodenum and head of pancreas.
Vasa Rectae
Terminal branches of intestinal arteries. Proximal Jejunum has long ones, Ileum has short ones.
Arcades
Interconnections between the intestinal arteries. Proximal jejunum has few, Ileum has many.
Ileocolic Artery
Branch of the Superior Mesenteric Artery supplying the Cecum. Gives rise to the appendicular artery. Will anastomos with intestinal arteries and the right colic artery.
Right Colic Artery
Branch of the Superior Mesenteric Artery. Supplies the ascending colon. Divides into a superior and inferior branch.
Middle Colic Artery
Branch of the Superior Mesenteric Artery. Supplies the Transverse Colon (has to pass through the transverse mesocolon)
Superior Mesenteric Vein
Posterior to the Pancreas, joins the splenic vein to from the hepatic portal vein. Along the right side of the Superior Mesenteric Artery.
Superior Mesenteric Lymph Nodes
Inside the Mesentery of the Small Intestine. Located near the origin of the Superior Mesenteric Artery.
Vermiform Appendix
Appendix
#1 Position of the Appendix
Retrocecal @ 64%
External Features of the Large Intestine
Teniae Coli, Haustra, and Omental (epiploic appendices)
Teniae Coli
Three narrow bands of longitudinal Muscle
Haustra
Outpouchings of the wall of the colon
Omental Appendices
Small accumulations of fat covered by visceral peritoneum
Epiploic Appendices
Omental Appendices
Inferior Mesenteric Artery
Arises from anterior surface of abdominal aorta at the L2 and L3 Vertebrae. Most of it lies retroperitoneal.
Left Colic Artery
Branch of the Inferior Mesenteric Artery. Supplies the descending colon and left 1/3rd of the transverse colon. Anastomoses with the middle colic branch of the Superior Mesenteric Artery
Sigmoid Arteries
Branch of the Inferior Mesenteric Artery. 3-4 Arteries that supply the Sigmoid Colon. Pass through the Sigmoid Mesocolon. (Form arcades)
Superior Rectal Artery
Branch of the Inferior Mesenteric Artery. Supplies proximal part of rectum. Split into a left and right and descending into the pelvis.
Inferior Mesenteric Vein
Ascends from the left side of the Inferior Mesenteric Artery. Posterior to pancreas, Joins the splenic vein most frequently or the superior mesenteric vein less frequently.
Inferior Mesenteric Nodes
Lymph nodes around the origin of the inferior mesenteric artery.