Epithelial tissue

3. it lacks blood vessels
8. a flat cell (it is wider than it is high).
9. vessel, or that is exposed to the body exterior.
13. the basic structural and functional unit of all organisms
15. the ground substance and fibers between cells in a connective tissue.
16. the epithelium that lines the bladder cavity. Its apical cells change their shape as the bladder fills with urine.
17. 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.
18. These short fibres cluster into a mesh-like network (reticulum = network) that covers and supports the structures bordering the connective tissue.
19. the surface of a cell that faces the lumen, which is the inner cavity of an organ or
20. inelastic fibres of great tensile strength made up of collagen protein.
21. a group of cells of similar structure that perform a common function.

1. the main function of epithelial tissue.
2. a cell that is as high as wide.
4. the epithelium with a single layer of cuboidal cells.
5. an epithelium with a single layer of cells.
6. the basal surface of epithelial cells lies on it.
7. the epithelium with a single layer of flat cells.
10. this epithelium seems stratified but it's not.
11. a cell that is taller than it is wide.
12. fibres composed primarily of the protein elastin (rubber like protein) that allows them to function like rubber bands.
14. an epithelium with more layers of cells.