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Skin anatomy chc training 2012 [compatibility mode] [repaired]
1.
2. Skin
Body's largest organ: ~ 16% total body weight
1.2 to 2.3 m2
surface area
Described as bodyโs โCutaneous envelopโ
Protects us from the outside world
3.
4.
5.
6.
7. Epidermis
Incredibly thinโฆ..as thin as a piece of paper
Total skin thickness is 1.5 to 4 mm
Thickness of epidermis is between 0.06 โ 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)
8.
9. 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 โ the stratum
corneum
10.
11. Dermis
Dermis is 20 to 40 times thicker than the epidermis
Provides a flexible support structure
Encloses the blood vessels, nerve and glands
Dermis
12.
13.
14.
15. โข 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 bacteriaโฆโฆ Body Odour
Sweat Glands
16.
17.
18.
19.
20. 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
25. 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
26. Transient, solid, itchy, raised area of
cutaneous edema with irregular
shape, different diameter and
erythema.
e. g.:
- urticaria
- insect bites
Wheal