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Under Your Skin

Under Your Skin. Activity 5.1.1. 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. Key Terms For This Activity 5.1.1. Epidermis Dermis Subcutaneous layer (fat lobules) Nerves Blood vessels

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Under Your Skin

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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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