Skin
Body's largest organ: ~ 16% total body weight
1.2 to 2.3 m2
surface area
Described as body’s “Cutaneous envelop”
Prot...
Epidermis
Incredibly thin…..as thin as a piece of paper
Total skin thickness is 1.5 to 4 mm
Thickness of epidermis is betw...
Process of Keratinization
The skin is in continuous process of self-
renewal
Keratinization is the series of events
throug...
Dermis
Dermis is 20 to 40 times thicker than the epidermis
Provides a flexible support structure
Encloses the blood vessel...
• Apocrine sweat glands
Large specialized sweat glands localized in axilla,
areola, bearded regions of the face in adult m...
Protection: Physical trauma, micro-organism and
Harmful UV light
Regulation of body temperature
Maintenance of fluid and e...
Skin Lesions
Small solid, elevated skin lesion,
usually 1 cm or less in diameter.
Seen in many skin diseases like
Acne
Papule
Elevated, flat-topped lesion
Usually greater than 1cm in diameter;
Described as being shaped like plateau
e. g.:
- psorias...
Solid deep seated mass in the dermis or
subcutaneous tissue
Produces elevation on the skin surface
Can be seen in gross in...
Transient, solid, itchy, raised area of
cutaneous edema with irregular
shape, different diameter and
erythema.
e. g.:
- ur...
Elevated, thin-walled lesion;
filled with serous fluid, less than
1 cm in diameter.
Ex.:
- Herpes simplex
- Varicella
- He...
Thickened and rough
epidermis
Skin looks dry and leathery
e .g.:
- Atopic dermatitis
Lichenification
Change in skin’s appearance
following repair after skin
injury.
e. g.:
- healed wound
Scar
A linear and small split or
crack in the epidermis and
dermis.
e. g.:
- Cracked feet
Fissure
Depressed lesion that is wider
than a fissure but not as deep
Erosion
Deep erosion in which all
of epidermis and part of
dermis are eaten away
e. g.:
-wound ulcer
-Bed sore
Ulcers
Reduction of skin thickness occurring
at any skin layer.
e. g.:
- aged skin
Atrophy
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
Skin anatomy chc training 2012 [compatibility mode] [repaired]
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Skin anatomy chc training 2012 [compatibility mode] [repaired]

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Skin anatomy chc training 2012 [compatibility mode] [repaired]

  1. 1. Skin Body's largest organ: ~ 16% total body weight 1.2 to 2.3 m2 surface area Described as body’s “Cutaneous envelop” Protects us from the outside world
  2. 2. Epidermis Incredibly thin…..as thin as a piece of paper Total skin thickness is 1.5 to 4 mm Thickness of epidermis is between 0.06 – 0.1 mm ( except on palms and soles) Epidermis is made of 5 distinct cell layers - stratum corneum (Horny cell layer) - stratum lucidum (Clear cell layer) - stratum granulosum (Granular cell layer) - stratum spinosum (Prickle cell layer) - stratum Germinativum (Basal cell layer)
  3. 3. Process of Keratinization The skin is in continuous process of self- renewal Keratinization is the series of events through which the epidermis forms its protective outer sheath – the stratum corneum
  4. 4. Dermis Dermis is 20 to 40 times thicker than the epidermis Provides a flexible support structure Encloses the blood vessels, nerve and glands Dermis
  5. 5. • Apocrine sweat glands Large specialized sweat glands localized in axilla, areola, bearded regions of the face in adult males. Begin to function in puberty and respond to hormones Secrete oily colorless substance Sweat decomposed by bacteria…… Body Odour Sweat Glands
  6. 6. Protection: Physical trauma, micro-organism and Harmful UV light Regulation of body temperature Maintenance of fluid and electrolyte balance Transmission of sensations of pain, touch, pressure, warmth and cold Synthesis of vitamin D Functions of the Skin
  7. 7. Skin Lesions
  8. 8. Small solid, elevated skin lesion, usually 1 cm or less in diameter. Seen in many skin diseases like Acne Papule
  9. 9. Elevated, flat-topped lesion Usually greater than 1cm in diameter; Described as being shaped like plateau e. g.: - psoriasis Plaque
  10. 10. Solid deep seated mass in the dermis or subcutaneous tissue Produces elevation on the skin surface Can be seen in gross inspection or only on palpation. Ex.: - Nodulocystic acne Nodule
  11. 11. Transient, solid, itchy, raised area of cutaneous edema with irregular shape, different diameter and erythema. e. g.: - urticaria - insect bites Wheal
  12. 12. Elevated, thin-walled lesion; filled with serous fluid, less than 1 cm in diameter. Ex.: - Herpes simplex - Varicella - Herpes Zoster Vesicle
  13. 13. Thickened and rough epidermis Skin looks dry and leathery e .g.: - Atopic dermatitis Lichenification
  14. 14. Change in skin’s appearance following repair after skin injury. e. g.: - healed wound Scar
  15. 15. A linear and small split or crack in the epidermis and dermis. e. g.: - Cracked feet Fissure
  16. 16. Depressed lesion that is wider than a fissure but not as deep Erosion
  17. 17. Deep erosion in which all of epidermis and part of dermis are eaten away e. g.: -wound ulcer -Bed sore Ulcers
  18. 18. Reduction of skin thickness occurring at any skin layer. e. g.: - aged skin Atrophy

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