Assertion: alimentary canal's layer | /r/CapableOf | find rich
Facets:
Source sentences:
text: lubricate and protection - Muscularis Mucosa - thicker at lower end, only one layer running longitudinal, well developed closer to stomach Columunar epithelia toward inside B. Submucosa CT layer - Esophageal glands proper (secretes mucous to lubricate the wall of the GI track, found rich in the lower part of the esophagus)