Epithelial Tissue

1. dead cells
5. two or more layers
6. flattened cells that can be keratinized or nonkeratinized; involved in protection and diffusion; found in capillary walls and skin
9. alive cells
10. lacks blood vessels
11. layer nearest to the lumen and may have specialized extensions
13. penetrated with nerve endings
15. one layer
16. cube-shaped cells; found forming tubes in nephrons of kidney; involved in secretion and absorption
17. layer nearest to the basement membrane
18. replacement of dead cells with new ones
19. tissue made of binucleated cells which is used to distend the tissues of the urinary tract

2. composed of one or more layers of closely packed cells and can be found covering body surfaces, lining body cavities, and forming the majority of the body’s glands
3. small processes projecting from the surface used to increase surface area and have a hand in diffusion
4. rectangular cells; cilia often present; involved in absorption, secretion, protection, and lubrication; form inner lining of gut tube
7. membrane, thin barrier between connective tissues and the most basal layer of epithelial cells
8. small processes that brush small structures through a free space
12. simple epithelia that appear to be stratified, but are actually one layer
14. group of similarly structured cells that are organized to perform one or more specific functions