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Life Science 1.4 : The Integumentary System
Life Science 1.4 : The Integumentary System
Life Science 1.4 : The Integumentary System
Life Science 1.4 : The Integumentary System
Life Science 1.4 : The Integumentary System
Life Science 1.4 : The Integumentary System
Life Science 1.4 : The Integumentary System
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Life Science 1.4 : The Integumentary System

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  • 1. Life Science : 1.4<br />The Integumentary System<br />
  • 2. Objectives:<br />List four functions of skin.<br />Describe the two layers of skin.<br />Describe the structure and function of hair and nails.<br />Describe two kinds of damage that can affect skin.<br />
  • 3. Functions of Skin<br />Integumentary system<br />Organ system that forms a protective covering on the outside of the body.<br />Made up of your skin, hair, and nails.<br />Skin protects you by <br />Keeping water in your body and foreign particles out of your body.<br />Nerve endings in your skin let you <br />Feel things around you.<br />Skin helps regulate <br />Your body temperature. <br />Skin Also helps <br />Get rid of waste chemicals in sweat.<br />Melanin<br />Determines color of skin<br />
  • 4. Layers of Skin<br />Epidermis<br />Outermost layer of skin. <br />Most cells in the epidermis are dead.<br />Thick as only 2 sheets of paper.<br />Keratin<br />Protein that makes skin tough.<br />Dermis <br />Thicker layer of skin that lies beneath the epidermis.<br />Collagen<br />Protein fibers giving skin strength.<br />
  • 5.
  • 6. Hair and Nails<br />Hair helps <br />Protect skin from ultraviolet light <br />Regulate body temperature in most mammals.<br />Keep particles out of eyes and nose.<br />A hair forms at the bottom of a tiny sac called a hair follicle. <br />Nails protect <br />The tips of your fingers and toes.<br />A nail grows from living cells in the nail rootat the base of the nail. <br />
  • 7. Skin Injuries<br />Skin is often damaged, but fortunately can repair itself. <br />However, damage to the genetic material in skin cells can cause skin cancer.<br />

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