1. SKIN

2. Structure of Skin

4. Functions of Skin: Sensation Heat Regulation Absorption Protection
Excretion
Secretion
Vitamin D formation Shapes VD

6. Vitamin D Production

7. Layers of the Epidermis
Stratum Corneum
Stratum Lucidum
Stratum Granulosum
Stratum Spinosum
Stratum Germinativum
Come Lets Go See Grandad!

8. Epidermis Thick skin (on palms, fingertips, soles) has 5 strata.
Thin skin has only 4. The stratum lucidum is absent and the other layers are visibly thinner.
Stratum Basale—deepest layer. Attached to the dermis. Sometimes called the stratum germinativum because of the constant mitosis that occurs there.

14. Dermis Made mostly of connective tissue. The hide of the human body.
Richly innervated and vascularized.
Contains the hair follicles, sweat glands, oil glands, lymphatic vessels, and many sensory receptors

15. Melanocytes—synthesize melanin.
Located at the deepest layer of the epidermis..
Protects against UV damage.

16. Sweat Sweat Glands— more than 2.5 million per person.
Eccrine sweat glands—coil in the dermis, a duct leads to a pore at the skin’s superficial surface.
Sweat contents: water, urea
How does sweat work?
Apocrine sweat glands—in the axillary and anogenital areas. Empty into hair follicles. Contains fatty substances and proteins. May cause body odor. Begin to function at puberty. May contain pheromones

17. Sebaceous glands Oil glands. Found everywhere except the palms
and soles.
Secrete sebum.
Usually secreted into hair follicles.
Bactericidal + other functions

19. Skin Disorders:
Acne vulgaris caused by?
Caused by a virus

20. Fungal Infections Occur in warm, moist areas of body
Tinea pedis: fungal infection that thrives in warmth & dampness; often referred to as Athlete’s Foot or ringworm

21. Skin disorders and diseases
Contact Dermatitis
Basal Cell Carcinoma
Melanoma
Gangrene
Herpes Zoster

22. Ganglion
Impetigo
Gout
Herpes Simplex

23. Psoriasis
Eczema

24. Abnormal Skin Pigmentation
Cyanosis
Jaundice

25. Skin Revision Name the two layers of the skin
The skin has many functions, including elimination of waste products and production of melanin. List two other functions of the skin.
Describe a verruca

26. Dermatitis is a common condition found on the skin
Dermatitis is a common condition found on the skin. Give a possible cause for this condition, and describe how you would effectively treat someone with reflexology presenting with this condition.
What is the name of the chemical produced by the body during an allergic reaction?
Name the layers of the epidermis

27. At what layer does “cell birth” or reproduction occur in the skin?
Give an example of a bacterial infection of the skin
Give an example of a fungal infection of the skin