skin- the integumentary system will help you know about basic layers of skin and its basic functions

1. SKIN
THE INTEGUMENTARY SYSTEM
BY
ASWA NASIR

2. THE INTEGUMENTARY SYSTEM
• SKIN=INTEGUMENT
• SKIN+ACCESSORY ORGANS
(HAIRS,NAILS,CUTANEOUS
GLANDS)=INTEGUMENTARY
SYSTEM

3. THE ORGAN:SKIN
• THE SKIN IS THE LARGEST ORGAN OF THE
HUMAN BODY
• IT COVERS THE ENTIRE BODY
• ITS PLIABLE YET,TOUGH ALLOWING IT TO TAKE
CONSTANT PUNISHMENT FROM AGES

4. SKIN
• WITHOUT OUR SKIN WE WOULD QUICKLY
FALL PREY TO BACTERIA
• THE SKIN IS COMPOSED OF
TWO REGIONS
 EPIDERMIS
 DERMIS
THE EPIDERMIS IS THE OUTERMOST
PROTECTIVE SHIELD OF THE BODY

5. DERMIS
• DENSE IRREGULAR CONNECTIVE
TISSUES.
• HIGHLY VASCULAR
TWO LAYERS
o PAPILLARY LAYER JUST BELOW EPIDERMIS
o RETICULAR LAYER FORMS DEEP 80 %
• DERMIS CONTAINS MANY TYPES OF SENSRORY
RECEPTORS FOR
TOUCH,PRESSURE,VIBRATION,TEMPRATURE,
PAIN, ETC

6.  SUBCUTANEOUS JUST DEEP TO THE SKIN IS
CALLED THE HYPODERMIS
 THE HYPODERMIS STORES FAT AND ANCHORS
THE SKIN MOSTLY TO MUSCLE
TECHNICALLY NOT A PART OF SYSTEM

7. APPENDAGES OF SKIN
• HAIR FOLLICLES AND HAIR
• SWEAT GLANDS
• SABACEOUS [OIL] GLANDS
• NAILS ON FINGERS AND TOES

8. THE FUNCTION
• THE PRIMARY FUCTION OF THE SKIN IS TO PROVIDE
PROTECTION.
• IT IS A TWO-WAY BARRIER BETWEEN THE INTERNAL
ENVIRONMENT AND THE OUTSIDE WORLD.
• IT PLAYS AN IMPORTANT ROLE IN THE REGULATION OF
TEMPRATURE.
• IT SECRETES IMPORTANT FLUIDS.
• THE TWO-WAY BARRIER IS CAPABLE OF KEEPING
PATHOGENS[DISEASE CAUSING ORGANISMS] AND HARMFUL
CHEMICALS FROM ENTERING THE BODY.
• IT STOPS CRITICAL BODY FLUIDS FROM ESCAPING THE BODY.
• IT PREVENTS INJURY TO THE INTERNAL ORGANS LYING
UNDERNEATH THE SKIN.

9. FACT
• WE LOSE 30,000 TO 50,000 OLD DEAD SKIN
CELLS PER MINUTE AND REPLACE THEM WITH
NEW YOUNGER CELLS.INFACT,BECAUSE OF
THIS PROCESS,OUR SKIN IS REPLACED
ENTIRELY ABOUT EVERY SEVEN YEARS

10. .
THE END