bench definition, bench meaning | English dictionary. bench. n an apparatus for experimentation in optics, typically consisting of an adjustable arrangement of light source, lenses, prisms, etc. bench.
3 Principal characteristics of cells that make up epithelium. -Cells are closely apposed-they adhere to one another via specialized cell junctions-Exhibit both structural and functional polarity-Epithelium creates a selective barrier between the external environment and the underlying connective tissue.î î î.Cells are closely apposed-they adhere to one another via specialized cell junctions-Exhibit both structural and functional polarity-Epithelium creates a selective barrier between the external environment and the underlying connective tissue. î î î.
1 By convention, a stratified epithelium is described according to the shape of cells on its free surface. 2  Regardless of whether the surface cells are squamous, cuboidal, or columnar, the underlying cells are usually cuboidal. Within the epithelium, the narrow spaces between cells are sealed off from the external environment by cell junctions near the free surface of the cells. 2  Compared to ordinary connective tissue, epithelial tissue has very little interstitial fluid. 3  Epithelial tissue is polarized.