Path followed:
1. Is the fault in the components that perform any physical action?
Answer: No
2. Is the faulty component part of the mechanism’s body?
Answer: Yes
3. Is the faulty component in the structure of the mechanism?
Answer: No
4. Does the damaged component provide protection?
Answer: No
5. Is the surrounding structure damaged?
Answer: No
6. Is the adaptation internal?
Answer: Yes
61) Hair regrowth
Hair is comprised of two major structures: follicle and shaft. The follicle is a tunnel-like segment that extends into the dermis (ÒHair Loss: The Science of HairÓ). The papilla is found at the base of the follicle and contains capillaries to nourish the cells used to create the hair. The bulb surrounds the papilla and is where the cells are proliferating to create the hair shaft and push it out of the epidermis during the anagen phase. Inner and outer sheaths surround the hair shaft, which are used to protect and form the hair shaft. The hair shaft is made of keratin in three layers: medulla, cortex, and cuticle. The medulla is the inner layer, cortex is the second layer, and the cuticle is the outer layer. The cortex and medulla hold the hairÕs pigment to give it color (ÒHair Loss: The Science of HairÓ).
“Hair Loss: The Science of Hair.” Science of Hair: Hair Growth. WebMD, 1 Mar. 2010. Web. 7 Dec. 2014.
http://www.webmd.com/skin-problems-and-treatments/hair-loss/science-hair?page=2
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