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The lesser sac, also known as the omental bursa, is a part of the peritoneal cavity that is formed by the lesser and greater omentum. Usually found in mammals, it is connected with the greater sac via the omental foramen or Foramen of Winslow. In mammals, it is common for the lesser sac to contain considerable amounts of fat.
There are two main regions of the peritoneal cavity, connected by the omental foramen. The greater sac, represented in red in the diagrams above. The lesser sac, represented in blue. The lesser sac is divided into two "omenta": The lesser omentum (or hepatogastric) is attached to the lesser curvature of the stomach and the liver. [5]
The peritoneal cavity is divided into the greater and lesser sacs. The greater sac comprises the majority of the peritoneal cavity, while the lesser sac, also known as the omental bursa, is smaller and situated posterior to the stomach and lesser omentum. They are connected by the omental foramen. [4]
In human anatomy, the greater sac, also known as the general cavity (of the abdomen) or peritoneum of the peritoneal cavity proper, is the cavity in the abdomen that is inside the peritoneum but outside the lesser sac. A description of the greater sac in three dimensions.
Greater and lesser omentum. The greater omentum is the larger of the two peritoneal folds. It consists of a double sheet of peritoneum, folded on itself so that it has four layers. [2] The two layers of the greater omentum descend from the greater curvature of the stomach and the beginning of the duodenum. [2]
The lesser omentum (small omentum or gastrohepatic omentum) is the double layer of peritoneum that extends from the liver to the lesser curvature of the stomach, and to the first part of the duodenum. The lesser omentum is usually divided into these two connecting parts: the hepatogastric ligament, and the hepatoduodenal ligament. [1]
In supine patients, infected fluid from the right iliac fossa may ascend in the paracolic gutter to enter the lesser sac. In patients nursed in a sitting position, fluid from the stomach, duodenum, or gallbladder may run down the paracolic gutter to collect in the right iliac fossa or pelvis. This may mimic acute appendicitis or form a pelvic ...
The peritoneum, by virtue of its connection to the two (parietal and visceral) portions, gives support to the abdominal organs. The peritoneum divides the cavity into numerous compartments. One of these the lesser sac is located behind the stomach and joins into the greater sac via the foramen of Winslow . [ 1 ]