| Lesser sac | |
|---|---|
 The lesser sac (omental bursa) shown in blue, and the greater sac (general cavity) shown in red | |
| Details | |
| Identifiers | |
| Latin | bursa omentalis |
| TA98 | A10.1.02.402 |
| TA2 | 3703 |
| FMA | 19800 |
| Anatomical terminology | |
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.