Which wall of the alimentary canal is actually organized into two distinct layers?

The muscularis layer of the alimentary canal is organized into two distinct layers: an inner circular layer and an outer longitudinal layer. This arrangement allows for coordinated peristaltic movements, facilitating the movement of food along the digestive tract. The circular layer constricts the lumen, while the longitudinal layer shortens the segment of the canal, enhancing the efficiency of digestion and propulsion.