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.
Covering and Lining Epithelium. 1  Epithelial tissue can be divided into categories based on the shape of the cells and the number of layers of cells. 2  Shapes of cells. 3  Squamous  cells are flat; their thinness allows substances to pass through them. 4  Cuboidal  cube shaped or hexagon-shaped. 5  Columnar  cells are tall and cylindrical. 6  Transitional  ...