Epithelial tissue

6. an epithelium with a single layer of cells.
7. the surface of a cell that faces the lumen, which is the inner cavity of an organ or blood vessel, or that is exposed to the body exterior.
9. the epithelium with a single layer of flat cells.
10. a cell that is as high as wide.
13. the ground substance and fibers between cells in a connective tissue.
17. inelastic fibres of great tensile strength made up of collagen protein.
18. fibres composed primarily of the protein elastin (rubber like protein) that allows them to function like rubber bands.
19. a group of cells of similar structure that perform a common function.
20. the main function of epithelial tissue.

1. the epithelium with a single layer of cuboidal cells.
2. the basal surface of epithelial cells lies on it.
3. A passive process in which there is a net or greater movement of molecules or ions from a region of high concentration to a region of low concentration until equilibrium is reached.
4. a flat cell (it is wider than it is high).
5. a cell that is taller than it is wide.
8. it lacks blood vessels
11. an epithelium with more layers of cells.
12. the epithelium that lines the bladder cavity. Its apical cells change their shape as the bladder fills with urine.
14. the basic structural and functional unit of all organisms
15. this epithelium seems stratified but it's not.
16. These short fibres cluster into a mesh-like network (reticulum = network) that covers and supports the structures bordering the connective tissue.