a thin piece of wood or other rigid material used to immobilize a fractured or dislocated bone, or to maintain any part of the body in a fixed position. 2. one of a number of thin strips of wood woven together to make a chair seat, basket, etc.
If you take a close look at epithelial cells using a microscope, you will see them tightly packed together. This helps make a protective barrier for our bodies. There are also some special door-like connections between each epithelial cell called gap junctions. The gap junctions are where the cells exchange nutrients.
â¦ The endothelial cells that make up the endothelium are a single layer of cells. This single sheet of endothelium is so thin that molecules of water and oxygen can easily penetrate the layer and access the surrounding tissue. Also, the endothelial cells lack a tightly packed epithelial morphology.or instance, the outermost layer of the skin, the epidermis, is nothing but the epithelium. Thus, the superficial skin is lined by epithelial cells, thereby, forming a protective barrier against the external environment.