part of part_of part of part_of contributes to morphology of smooth muscle tissue wall of stomach mesoderm-derived structure stomach smooth muscle muscular coat stomach muscularis externa FMA:14909 The smooth muscle layer of the stomach wall that functions to churn and mix food and gastric secretions as well as to move food along the digestive tract to the intestines UBERON:0008856 gastric muscularis muscle layer of stomach muscularis externa of stomach the muscularis externa in the stomach differs from that of other GI organs in that it has three layers of smooth muscle instead of two tunica muscularis (gaster) tunica muscularis gastris uberon muscular coat of digestive tract layer of smooth muscle tissue