Structure of Skin

2. Only layer of epithelial cells that undergo mitosis (regeneration activity)
3. Unique area between the epidermis and dermis
4. If wounds or incisions occur along these lines, the resulting wound will have less tendency to gape open and will tend to heal with a thin and less noticeable scar
6. Formed from 8 to 10 layers of irregularly shaped cells with very prominent intercellular bridges(desmosomes)
8. The thin superficial layer of the dermis that forms bumps
10. Dying cells are filled with eleidin- which will eventually turn to keratin
12. Means “dusky black substance”
15. The hairless skin covering the palms of the hands, soles of feet, and other parts of the body subject to friction
19. Cells Branched cells that play a role in immunity
20. Large marsupial
21. Skin is a thin, relatively flat organ classified as a membrane
22. Form when there is an abnormally thick stratum corneum

1. Cells are arranged in 2 to 4 layers deep and are filled with intensely staining granules called keratohyalin
5. Literally means “true black substance”
7. Composed of very think squamous cells, which at the skin’s surface are dead and continually being shed and replaced
9. Receptors Process sensory information
11. Skin that covers most of the body
13. Lies deep to the dermis and thus forms a connection between the skin and the underlying structures of the body
14. Form the principal structural element of the outer skin is a fibrous protein
16. If the enzyme tyrosinase is absent from birth because of genetic mutation, the melanocytes cannot form melanin
17. Serve to decrease the amount of ultraviolet(UV) light that can penetrate into the deeper layers of skin
18. Consists of dense reticulum or network of fibers