3. Layers of the skin.
• Epidermis: It is the outermost area and
composed of epithelial cells. The Epidermis
consist of four or five distinctive layers.
• Dermis: underlying layer and composed
mainly of fibrous connective tissue. The
Dermis has two layer- the papillary and the
reticular
• Extreme stretching of the skin can tear the
dermis commonly called “stretch marks”
6. Functions of the skin.
• Body temperature regulation.
• Excrete toxic substance from the body.
• Sensory response (touch, heat, cold and etc.)
• Formation of vitamin.
• Protection against diseases.
• Blood reservoir.
7. • The study of the skin is called dermatology.
• Physician of the skin called Dermatologist.
13. Skin Cancer
• Melanoma: Cause by over exposure to UV-
light. Common treatment is by surgery to
remove the melanoma.
• Nonmelanoma: Consist of the Squamous cell
cancer and the Basal cell cancer.
14. Cancer Prevention.
• Try to stay out of the sun during middle of the
day.
• Use protective clothes.
• Use sunscreen.
• Avoid excessive sunbath and tanning.
