(n.) 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.

Leatherette Leatheroid blastoderm coat corium cuticle cutis cutis vera derma ectoblast ectoderm endothelium entoderm epiblast epidermis epithelium fell fleece flesh fur furring hide hypodermis imitation fur imitation leather integument jacket leather leather paper mesoderm outer layer outer skin pavement epithelium pelt peltry rawhide rind scarfskin sheath skin skins tegument true skin vair