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Any of the cells forming the cellular sheets that cover surfaces, both inside and outside the body. Epithelial cells are closely packed and take on polyhedral shapes, from tall columnar through squat cuboidal to flat squamous.Invites aux obseques de Jean Rochefort a Paris
Epithelial cells adhere strongly to one another, and one of their surfaces -- the basal surface -- sticks firmly to a thin extracellular film of fibrils called a basal lamina. A sheet of epithelial cells derived from embryonic epithelia the ectoderm or the endoderm is called an epithelium.
See: epithelium The type of cell composing multicellular, as well as a number of unicellular, organisms.