Baltsaa. Answered in digestive system. The gastrointestinal tract is made up of. simple columnar eithelium throughout the alimentary canal, but strtified squamous epithelium lines the alimentary canal from mouth to stomach (also anal canal) where abrasions are most likely to occur.Baltsaa.ontains skeletal muscle in mouth,pharynx,and esophagus to assist in voluntary swallowing. smooth muscle throughout the remainder of alimentary canal breaks food down mixes it with secreteions and moves it toward anus.