SKIN FACTS : GROWS FASTER THAN ANY OTHER ORGAN. APPROX. 19,000,000 SKINS CELLS ON EVERY SQ. INCH OF YOUR BODY ADULTS HAVE APPROX. 8 LBS & 22 SQ. FEET HUMANS.

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SKIN FACTS : GROWS FASTER THAN ANY OTHER ORGAN. APPROX. 19,000,000 SKINS CELLS ON EVERY SQ. INCH OF YOUR BODY ADULTS HAVE APPROX. 8 LBS & 22 SQ. FEET HUMANS SHED ABOUT 600,000 PARTICLES OF SKIN EVERY HOUR- 1.5 LBS. A YEAR EACH SQUARE INCH OF SKIN CONSISTS OF 20 FT OF BLOOD VESSELS

DUST MITE

MORE SKIN FACTS: THE EPIDERMIS RENEWS ITSELF COMPLETELY EVERY 2 MONTHS. NERVE CELLS IN SKIN MAKE IT SENSTIVE TO TOUCH, PRESSURE & TEMPERATURE

SKIN: 2 MAIN LAYERS: EPIDERMIS & DERMIS

TOP LAYER OF SKIN: EPIDERMIS MADE OF EPITHELIAL TISSUE ARRANGED IN FLAT SHEETS PREVENTS DAMAGE TO THE CELLS THAT LIE BENEATH IT UPPERMOST LAYERS MADE OF DEAD CELLS THE DEEPER LEVELS CONTAIN SKIN PIGMENT- MELANIN

THE 2 ND LAYER : THE DERMIS COMPOSED MAINLY OF CONNECTIVE TISSUE CONTAINS NERVES, MUSCLES, BLOOD VESSELS, HAIR FOLLICLES & GLANDS

SKIN & HOMEOSTASIS PRIMARY FUNCTION IS TO ACT AS A PHYSICAL BARRIER BETWEEN THE ORGANISM & ITS EXTERNAL ENVIRONMENT

SKIN : PROTECTS FROM H2O LOSS THE PRESENCE OF CELLS CALLED KERATINOCYTES IN THE EPIDERMIS HELPS PREVENT WATER LOSS - DEHYDRATION

DEHYDRATED SKIN

SKIN : HELPS MAINTAIN BODY TEMPERATURE THE DERMIS WITH ITS GREAT BLOOD SUPPLY, PLAYS A PART IN MAINTAINING THE BODY’S TEMPERATURE BY CONSTRICTION & DIALATION OF THE BLOOD VESSELS

SKIN : HELPS MAINTAIN BODY TEMPERATURE – SWEAT GLANDS THE EVAPORATION OF SWEAT FROM FROM THE SKIN CAUSES THE BODY TO COOL.

SKIN: PROTECTS US FROM DISEASE THE TOUGH EPIDERMIS WITH ITS ACIDIC ENVIRONMENT MAKES IT INHOSPITABLE TO MICROORGANISMS.

SKIN FUNGUS

SKIN : GIVES US SOME PROTECTION FROM UV RADIATION THE LOWER EPIDERMIS PRODUCES A PIGMENT CALLED MELANIN – WHICH IS REGULATED BY GENETICS & EXPOSURE TO THE SUN. THE DARKER THE MELANIN THE LESS LIKELY YOU ARE TO BURN.

SEVERE SUNBURN

MELANOCYTES – SKIN PIGMENT

ALBINISM

SKIN PIGMENTS

SKIN: SENSITIVITY & COMMUNICATION FINGERS MOST SENSITIVE TO STIMULI - THE BACK THE LEAST. CAN COMMUNICATE THE STATE OF HEALTH BY COLOR CHANGE: EX. FLUSHED CAN CONVEY EMOTION – BLUSHING HELP US TO INTERACT WITH OUR ENVIRONMENT

SKIN RESPONSE : GOOSE BUMPS