What are the three sheets of muscle in the stomach muscularis externa?

The muscularis externa of the stomach consists of three distinct sheets of muscle: the outer longitudinal layer, the middle circular layer, and the inner oblique layer. The outer longitudinal layer runs along the length of the stomach, while the middle circular layer encircles the stomach, helping to mix and propel the contents. The inner oblique layer is unique to the stomach and aids in the mechanical breakdown of food. Together, these layers facilitate the stomach's complex movements essential for digestion.