Mathematics. the identity element of a group in which the operation is addition. (of a function, especially of a function of a complex variable) a point at which a given function, usually a function of a complex variable, has the value zero; a root.
Mucosa buccalis. The inner lining of the cheeks and lips, which is an anatomic region that includes all the mucous membrane lining of the inner surface of the cheeks and lips, from the line of contact of the opposing lips to the line of attachment of mucosa to the alveolar ridges and pterygomandibular raphe, which occupies an area of 50â60 cm2.
Mucosa - Includes a columnar epithelium with large number of mucus-secreting goblet cells (villi; present in small intestine; absent in colon), lamina propria, and muscularis mucosa; the appendix is rich in mucosa-associated lymphoid tissue (MALT) Submucosa - Contains the blood vessels and Meissner nerve plexus.