Source:http://linkedlifedata.com/resource/umls/id/C1519375
NCI: The tissue of the small intestine. It comprises four layers - mucosa with simple columnar epithelium, submucosa, smooth muscle with inner circular and outer longitudinal layers, and serosa. (NCI),NCI: The tissue of the small intestine. It comprises four layers - mucosa with simple columnar epithelium, submucosa, smooth muscle with inner circular and outer longitudinal layers, and serosa.