1. SKIN Health Science Technology I Dr. Halbert
INTEGUMENTARY SYSTEM
SKIN
Health Science Technology I
Dr. Halbert

3. Three main layers of skin
Epidermis
Dermis
Dermis is called true skin
Notice pressure and touch receptor location
Dermis contains sweat and sebaceous (oil) glands- located in or near hair follicles over entire skin surface
Oil glands can become clogged with cell overgrowth but oil gland continues to produce causing blackheads or pimples
Hair and nails are composed of keratin
Subcutaneous Fatty Tissue 3

4. Epidermis Outermost layer Cells constantly being shed
Contains no blood vessels or nerves
5 layers
Stratum corneum: outer part
Stratum germinativum: inner layer

5. Dermis
“true skin”
Made up of elastic connective tissue and contains vessels, nerves, glands, hair follicles
Top layer covered with papillae which form ridges which make up our fingerprints

6. Subcutaneous fascia or hypodermis
Innermost layer
Connects skin to the muscle underneath

8. Sudoriferous glands Sweat glands
Eliminate water, salts and some body wastes
Coiled tubes

9. Sebaceous glands Oil glands Produce sebum Open in to hair follicles
When plugged results in pimple or blackhead

10. Alopecia
Lack of hair

11. Functions of the skin Protection Perception Regulation of temperature
Storage of fat, water, vitamins
Absorption
Excretion
Production of Vitamin D

13. Skin pigment
Melanin: brown-black pigment, does absorb UV light resulting in a tan
Carotene: yellowish-red pigment

14. Albino
Absence of color pigment

15. Erythema Reddish color of the skin
Burns or congestion of blood in vessels

16. Jaundice Yellow discoloration
Liver or gallbladder disease or destruction of red blood cells

17. Cyanosis
Bluish discoloration
Insufficient oxygen

18. Macules
Flat spots on the skin
Ex: freckles

19. Papules
Firm raised areas
Pimples
Some stages of chicken pox

20. Vesicles
Blisters
Fluid filled sacs
Chicken pox

21. Pustules
Pus filled sacs
Ex: acne

22. Crusts
Dried pus and blood
scabs

23. Wheals
Itchy elevated areas with irregular shape
Hives

24. Ulcer
Deep loss of skin surface

25. Acne Vulgaris Inflammation of the sebaceous glands
Usually in adolescence
Hormonal changes, increased secretion of sebum are underlying causes

27. Athlete’s foot Contagious, fungal infection usually of feet
Blisters, cracks, itching

28. Skin cancer Melanoma, squamous cell carcinoma, basal cell carcinoma
May develop from moles

30. Dermatitis Inflammation of the skin
Caused by any substance that irritates skin, often allergic
Example: poison ivy

31. Eczema Non contagious, inflammatory disorder
Caused by allergy or irritant
Dryness, edema, erythema, itching, vesicles, crusts

32. Impetigo Highly contagious Bacterial infection- Staph or Strep
Pustules and yellow crusts

33. Psoriasis Chronic, non contagious, inherited
Thick red area with white scales

34. Ringworm Contagious, fungal infection
Usually circular with a clear central area

35. Verrucae
Warts
Viral
Rough, hard, elevated

36. Image Citations
Slide 4: Delmar Learning’s Medical Terminology Image Library, Second Edition. Version ISBN:
Slide 10: 1/3/06 Erythema Nodosum,
Slide 11: 1/3/06
Slide 12: 1/3/06 Central Cyanosis,
Slide 16: 1/3/06 Papules,
Slide 17: 1/3/06 Vesicles,
Slide 18: 1/3/06 Staphlococcal pustules, StaphPustule/StaphPustule.jpg
Slide 20: 1/3/06
Slide 21: 1/3/06 Skin Ulcer, .jpg

37. Image Citations
Slide 23: 1/3/06 Acne Vulgaris,
Slide 24: 1/3/06 Athlete’s foot, tinea pedis,
Slide 25: 1/3/06 Skin Cancer,
Slide 26: 1/3/06 Allergic Contact Dermatitis,
Slide 27: 1/3/06 Eczema,
Slide 28: 1/3/06, Impetigo, online.com/grafics/impetigo.jpg
Slide 29: 1/3/06, Psoriasis,
Slide 30: 1/3/06, Ringworm, ngworm.jpg
Slide 31: 1/3/06,