the skin or integumentary system
DESCRIPTION
THE SKIN OR INTEGUMENTARY SYSTEM. Remember the outer portion of the skin is an example of what type of tissue?. Epithelia Tissue. FUNCTIONS OF THE SKIN. PROTECTION THERMOREGULATION CUTANEOUS SENSATION PRODUCTION OF VITAMIN D BLOOD RESERVOIR EXCRETION. LAYERS OF THE SKIN. EPIDERMIS - PowerPoint PPT PresentationTRANSCRIPT
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