oblique layer

The stomach has a third layer: an innermost oblique layer.

This is the inner oblique layer, and helps churn the chyme in the stomach.

The outermost layer runs parallel to the vertical axis of the stomach (from top to bottom), the middle is concentric to the axis (horizontally circling the stomach cavity) and the innermost oblique layer, which is responsible for mixing and breaking down ingested food, runs diagonal to the longitudinal axis.