Greater/Lesser Omentum

location of the Greater Omentum

· Location: Extends from the greater curvature of stomach superiorly, laterally to left, and inferiorly.

What ligaments derive from Greater Omentum?

- Gastrophrenic Ligament: Connects stomach & and diaphragm.

- Gastrosplenic Ligament: Connects stomach & spleen.

- Gastrocolic Ligament: Connects stomach & intestines.

location of the Lesser Omentum

· Location: Connects the lesser curvature of the stomach and proximal duodenum to the liver.

What ligaments derive from Lesser Omentum?

- Hepatogastric Ligament: Connects liver to stomach.

- Hepatoduodenal Ligament: Conducts the portal triad (portal vein, hepatic artery, bile duct).

What are the two sacs in Peritoneal Cavity?

Greater Sac & Lesser Sac (Omental Bursa)

Subdivision of Greater Sac

- Supracolic Compartment: Houses liver, spleen, stomach.

- Infracolic Compartment: Houses small intestines, ascending & descending colon.

What separates the supracolic and infracolic compartments within the Greater Sac of the peritoneal cavity?

Division through the transverse mesocolon

Subdivision of Lesser Sac

- Posterior to the stomach.

- Contains:

o Superior Recess: Between diaphragm & liver.

o Inferior Recess: Between the greater omentum.

What structure connects Greater and Lesser Sac?

Omental Foramen

Know the name of the major arteries that supply blood to the esophagus.

· Bottom third: Esophageal branches of left gastric artery.

· Bottom third: Left phrenic artery (from celiac trunk).

· Top third: Esophageal branches of inferior thyroid artery.

· Middle third: Esophageal branches of thoracic aorta.

Know the 4 characteristics of the Large Intestine that identify it from the Small Intestine

· Taenia Coli: Three thick bands of longitudinal smooth muscle.

· Haustra: Sacculations/pouches between teniae.

· Omental Appendices: Small fatty appendices.

· Caliber: Larger than small intestine.