1. Advanced Biology
Chapter 5
Skin

2. 9-11 Pounds mm
Pliable

3. Epidermis
Dermis
Hypodermis
Adipose, Areolar Connective

5. Produce Keratin
Synthesize pigment Melanin

6. Epidermal Dendritic Cells
Bone Marrow

7. Epidermal/Dermal

8. Thick
Lucidum

9. Stratum Basale

11. Stratum Spinosum

13. Stratum Granulosum

15. Stratum Lucidum

17. Stratum Corneum
Abrasion
40 pounds

19. Dermis

20. Papillary Layer
Dermal Papillae
Papillae

21. Reticular Layer

23. Blister
Flexure Lines

24. Yellow to reddish-brown to black

25. Yellow to orange

26. Pinkish color in fair skin

27. Cyanosis

29. Redness or erythema

31. Pallor or blanching

32. Jaundice or yellow cast

34. Bronzing

35. Black and Blue Marks or Bruises

36. Advanced Biology
Appendages of the Skin

37. Glands Sweat (sudoriferous) Glands Eccrine sweat glands 99%
Apocrine sweat glands
Ceruminous
Sebaceous (Oil) glands

38. Hair and Hair Follicles
Is to detect insects
Scalp
Physical trauma, heat loss and sunlight

39. Structure of Hair
Hair or pili
Shaft
Root

40. Structure of Hair
Medulla
Cortex
Cuticle

43. Structure of Hair
Hair follicles
Hair bulb
Root hair plexus
Papilla

44. Structure of Hair Connective Tissue Root Sheath Epithelial Root Sheath
Hair Matrix
Arrector pili muscle

48. Hair and Hair Follicles
100,000
Vellus
Terminal
Alopecia
Male Pattern Baldness

49. Hair and Hair Follicles
Nail
Free edge
Body
Proximal root
Nail Matrix

50. Hair and Hair Follicles
Usually are pink due to capillaries
Lunula – lies over matrix
Nail folds – proximal and lateral borders of nail
Cuticle – area folded onto body