part of part of deep to contributes to morphology of composed primarily of smooth muscle tissue organ component layer stomach muscularis externa stomach smooth muscle circular layer stomach smooth muscle inner oblique layer UBERON:0008862 oblique muscle layer of stomach The innermost layer of the muscularis; it is not present in all sections of the stomach but is clearly seen in the fundus and near the lesser curvature of the corpus; the oblique fibers disappear distally (towards the pyloric antrum); the oblique layer is responsible for creating the motion that churns and physically breaks down the food. inner oblique muscle layer of stomach FMA:14912 The only layer of the three which is not seen in other parts of the digestive system[WP]. oblique fiber layer of gastric muscularis layer of smooth muscle tissue