1. THE SKIN OR INTEGUMENTARY SYSTEM

2. Remember the outer portion of the skin is an example of what type of tissue?

3. Epithelia Tissue

4. PRODUCTION OF VITAMIN D
FUNCTIONS OF THE SKIN
PROTECTION
THERMOREGULATION
CUTANEOUS SENSATION
PRODUCTION OF VITAMIN D
BLOOD RESERVOIR
EXCRETION

5. LAYERS OF THE SKIN
EPIDERMIS
DERMIS
HYPODERMIS

6. STRATIFIED SQUAMOUS EPITHELIUM
EPIDERMIS
THICK
KERATINIZED
STRATIFIED SQUAMOUS EPITHELIUM
4-5 SUBLAYERS

7. LAYERS OF THE EPIDERMIS
STRATUM BASALE
STRATUM SPINOSUM
STRATUM GRANULOSUM
STRATUM LUCIDUM
STRATUM CORNEUM

9. STRATUM BASALE THE DEEPEST EPIDERMAL LAYER
A SINGLE ROW OF LIVING CELLS
RAPID CELL DIVISION
10-25% OF THESE CELLS ARE MELANOCYTES

10. STRATUM BASALE

11. STRATUM SPINOSUM SEVERAL LAYERS OF LIVING CELLS
CELL DIVISION IS SLOWER THAN BASALE

12. STRATUM SPINOSUM

13. STRATUM GRANULOSUM THIN, LIVING LAYER OF CELLS
KERATINOCYTES WATERPROOF IN THIS LAYER

14. STRATUM GRANULOSUM

15. LOCATED ONLY IN THICK SKIN (PALMS OF HANDS & SOLES OF FEET)
STRATUM LUCIDUM
DEAD CELLS
LOCATED ONLY IN THICK SKIN (PALMS OF HANDS & SOLES OF FEET)

16. STRATUM LUCIDUM

17. STRATUM CORNEUM
DEAD CELLS
SERVES TO PROTECT

18. STRATUM CORNEUM

19. HAIR FOLLICLES, OIL & SWEAT GLANDS ARE FOUND HERE
THE DERMIS
HAIR FOLLICLES, OIL & SWEAT GLANDS ARE FOUND HERE

20. EPIDERMIS
DERMIS

21. HAIR & ITS FUNCTIONS WARMTH; IT PREVENTS HEAT LOSS
DETECT INSECTS ON THE SKIN
PROTECTION
FILTER PARTICLES

22. FACTS ABOUT HAIR ABOUT 100,000 IN THE SCALP
ABOUT 30, 000 IN A MAN’S BEARD
RATE OF HAIR GROWTH AVERAGES 2 mm/WEEK
HAIR LOSS AVERAGES 90 HAIRS/DAY

23. SEVERE EMOTIONAL TRAUMA
HAIR LOSS
ALOPECIA: HAIR THINNING AND BALDNESS
CAUSES OF HAIR LOSS
HIGH FEVER
SURGERY
SEVERE EMOTIONAL TRAUMA
CERTAIN DRUGS
EXCESSIVE VITAMIN A
CHEMOTHERAPY DRUGS
RADIATION
GENETICS

24. POOR NUTRITION (ESPECIALLY LACK OF ENOUGH PROTEIN)
MOST IMPORTANT
POOR NUTRITION (ESPECIALLY LACK OF ENOUGH PROTEIN)
HORMONAL IMBALANCES