Final answer:
The space between layers of omentum is known as the peritoneal cavity, which is lubricated by serous fluid to allow organ movement without friction.
Step-by-step explanation:
The anatomical name of the space between layers of omentum is the peritoneal cavity. The omentum refers to the layers of the peritoneum that extend to connect the stomach with other abdominal organs. Specifically, there are two main folds of omentum: the lesser omentum that connects the stomach to the liver, and the greater omentum that hangs down from the greater curvature of the stomach and covers the intestines. Within the abdomen, these omental layers are part of the peritoneum which is further divided into parietal and visceral peritoneum, the former lines the abdominal wall while the latter enfolds abdominal organs. The peritoneal cavity is the potential space that is lubricated by serous fluid, allowing the abdominal organs to move freely against each other without friction.