Integumentory system

4. collagen-rich skin formed after the process of wound healing that is different from normal skin
6. skin condition in which melanocytes in certain areas lose the ability to produce melanin, possibly due an autoimmune reaction that leads to loss of color in patches
8. nail fold that meets the proximal end of the nail body, also called the cuticle
9. cancer that originates from basal cells in the epidermis of the skin
11. transitional phase marking the end of the anagen phase of the hair growth cycle
12. cell found in the stratum Basale of the epidermis that produces the pigment melanin
13. in hair, the outermost layer of keratinocytes originating from the hair matrix, as seen in a cross-section of the hair bulb
15. thickened area of skin that arises due to constant abrasion
19. superficial layer of the dermis, made of loose, areolar connective tissue
21. in hair, the second or middle layer of keratinocytes originating from the hair matrix, as seen in a cross-section of the hair bulb
23. pigment that determines the color of hair and skin
25. deepest layer of the epidermis, made of epidermal stem cells
26. in hair, the innermost layer of keratinocytes originating from the hair matrix
29. skin condition due to an allergic reaction, which resembles a rash
30. type of callus that is named for its shape and the elliptical motion of the abrasive force

1. cell that produces keratin and is the most predominant type of cell found in the epidermis
2. connective tissue connecting the integument to the underlying bone and muscle
3. most superficial layer of the epidermis
5. basal part of the nail body that consists of a crescent-shaped layer of thick epithelium
7. resting phase of the hair growth cycle initiated with catagen and terminated by the beginning of a new anagen phase of hair growth
10. pili smooth muscle that is activated in response to external stimuli that pull on hair follicles and make the hair “stand up”
12. intercellular vesicle that transfers melanin from melanocytes into keratinocytes of the epidermis
14. outermost tissue layer of the skin
16. sweat gland type of sweat gland that is associated with hair follicles in the armpits and genital regions
17. genetic disorder that affects the skin, in which there is no melanin production
18. keratinous filament growing out of the epidermis
20. oily substance that is composed of a mixture of lipids that lubricates the skin and hair
22. type of structural protein that gives skin, hair, and nails its hard, water-resistant properties
24. active phase of the hair growth cycle
27. layer of skin between the epidermis and hypodermis, composed mainly of connective tissue and containing blood vessels, hair follicles, sweat glands, and other structures
28. skin condition due to infected sebaceous glands