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.
Epithelial cells are the individual cells of an epithelium, which is a layer of cells forming the surface of a structure or an inner lining. For example, there is an epithel â¦ ium lining the alimentary canal (gut), and another lining the alveoli of the lungs.Human skin also consists of epithelial cells.pithelial cells are the individual cells of an epithelium, which is a layer of cells forming the surface of a structure or an inner lining. For example, there is an epithel â¦ ium lining the alimentary canal (gut), and another lining the alveoli of the lungs. Human skin also consists of epithelial cells.