Noun
The superficial layer of cells lining the alimentary canal and all its appendages, all glands and their ducts, blood vessels and lymphatics, serous cavities, etc. It often includes the epidermis (i. e., keratin-producing epithelial cells), and it is sometimes restricted to the alimentary canal, the glands and their appendages, -- the term endothelium being applied to the lining membrane of the blood vessels, lymphatics, and serous cavities.
Source: Webster's dictionaryBoth tissue types, as well as the basal lamina of the epithelium, were accordingly lost more recently by radical secondary simplification. Source: Internet
Dietary increases in total fat or saturated fat result in elevated DCA and LCA in feces and elevated exposure of the colon epithelium to these bile acids. Source: Internet
A layer of connective tissue is visible under both types of epithelium. Source: Internet
A similar cycle of activity occurs in the posterior midgut and posterior midgut lumen, whereas aminopeptidase in the posterior midgut epithelium decreases in activity during digestion. Source: Internet
Cervix in relation to upper part of vagina and posterior portion of uterus., showing difference in covering epithelium of inner structures. Source: Internet
CFTR not only allows chloride ions to be drawn from the cell and into the ASL, but it also regulates another channel called ENac, whichallows sodium ions to leave the ASL and enter the respiratory epithelium. Source: Internet