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Skin Essentials: Functions, Components, & Health Impacts

Explore the functions and components of the skin, learn about the effects of sunlight and aging, and understand the role of accessory organs like sweat and sebaceous glands.

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Skin Essentials: Functions, Components, & Health Impacts

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  1. Under Your Skin Activity 5.1.1

  2. What is the function of your skin? • Mechanical barrier • Largest organ of the body • Some skin has hair • Some skin lacks hair and is smooth

  3. Key Terms For This Activity 5.1.1 • Epidermis • Dermis • Subcutaneous layer (fat lobules) • Nerves • Blood vessels • Sebaceous gland • Sweat gland • Hair follicle • Arrector pili muscle • Dermal papillae

  4. What are the major component parts to the skin?

  5. Review Prefixes • What does EPI- mean? Prefix for “above” • As in “epithelium”

  6. Does your skin have proteins?

  7. Does your skin have proteins? • Keratin • Collagen • Elastin • Melanin

  8. Accessory Organs • Sweat glands • Produce sweat • Helps regulate bodytemperature • Remove toxins from body • Found everywhere except lips and glans penis http://www.pg.com/science/skincare/Skin_tws_35.htm

  9. Accessory organs • Sebaceous glands • Attached to each hair follicle • Produces oil, called sebum: • Keeps skin and hair soft and flexible http://www.narconon.ca/images/detox_prot_sebaceous.jpg

  10. Effects of sun on skin • Wrinkles: result of collagen damaged by UVA not holding cells together • Sunburn: living skin cells killed DNA damaged • Suntan: warning that damage has occured • Melanin is produced (dark pigment) to protect further damage http://images.waterfrontmedia.com/everydayhealth/article/photos/popup_thumb/skin_115366_uv.jpg http://www.caribvoice.org/health.html

  11. Effects of Age on Skin • With age skin cell cycle goes from 5-40 days. • Keratin is produced as skin cells near surface: creates waterproof barrier. • As cell cycle lengthens, thicker layer of hard, dead cells which causes: • Roughness of skin • Wrinkles • Fine lines http://www.bioskincare.com/anti/

  12. 1.      What are the functions of skin? • 2.      What types of tissue make up the layers of the skin? • 3.      What role do accessory organs such as sweat glands and sebaceous glands play in the skin? • 4.      What happens to skin as it is exposed to sunlight and as a person ages?

  13. Sources • Proctor and Gamble.com [Internet]. 1997. U.S.: [Accessed July 21, 2009]. Available from: http://www.pg.com/science/skincare/Skin_tws_35.htm • National Geographic [Internet]. 2009. Washington, D.C.: [ Accessed July 22, 2009]. Available from: http://science.nationalgeographic.com/science/health-and-human-body/human-body/skin-article.html • Bioskincare [Internet]. Carson City, NV:[Accessed July 22, 2009]. Available from: http://www.bioskincare.com/anti/ • Go Sun Smart [Interent]. 2009. Bethesda, MD.:[Accessed July 22, 2009]. Available from: http://www.gosunsmart.org/yourskin/yourskin_effects.shtml

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