THE SKIN OR INTEGUMENTARY SYSTEM
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Transcript of THE SKIN OR INTEGUMENTARY SYSTEM
FUNCTIONS OF THE SKIN
• PROTECTION• THERMOREGULATION
• CUTANEOUS SENSATION• PRODUCTION OF VITAMIN D
• BLOOD RESERVOIR• EXCRETION
LAYERS OF THE EPIDERMIS
• STRATUM BASALE• STRATUM SPINOSUM
• STRATUM GRANULOSUM• STRATUM LUCIDUM• STRATUM CORNEUM
STRATUM BASALE
• THE DEEPEST EPIDERMAL LAYER• A SINGLE ROW OF LIVING CELLS
• RAPID CELL DIVISION• 10-25% OF THESE CELLS ARE
MELANOCYTES
HAIR & ITS FUNCTIONS
• WARMTH; IT PREVENTS HEAT LOSS
• DETECT INSECTS ON THE SKIN
• PROTECTION
• FILTER PARTICLES
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
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