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.
Respiratory System. #5 Trachea. Sections of the trachea are shown and the esophagus may be included. Note the hyaline cartilage in the wall of the trachea and the lining of pseudostratified ciliated columnar epithelium. Cilia are clearly seen in some areas but goblet cells may not be obvious. Exocrine glands are found beneath the epithelium. Lymph nodes and diffuse, sub-epithelial lymphatic tissue are seen.