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INTEGUMENTARY SYSTEM

INTEGUMENTARY SYSTEM. skin. Components of the integumentary system. Skin Hair Nails Glands . Skin is the human body’s largest organ. There is a video clip to watch – click on the picture at the left. The #1 function of skin. PROTECTION. How Skin Protects the Body.

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INTEGUMENTARY SYSTEM

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  1. INTEGUMENTARY SYSTEM skin

  2. Components of the integumentary system • Skin • Hair • Nails • Glands

  3. Skin is the human body’s largest organ There is a video clip to watch – click on the picture at the left

  4. The #1 function of skin • PROTECTION

  5. How Skin Protects the Body • Barrier against infection and injury • Help regulate body temperature • Remove waste products • Provide protection against UV radiation from the sun • Produce Vitamin D

  6. Skin also transmits sensations like… • Pressure • Heat • Cold • Pain

  7. Cool facts about skin • Waterproof • Self-repairing • Keeps germs and water OUT • Keeps body fluids (like blood) and salts IN • Sweat is a way to get rid of unneeded chemicals • Skin is alive and renews the top layer about once a month

  8. Layers of the skin • Top layer • Epidermis • Middle layer • Dermis • Bottom layer • Subcutaneous layer

  9. What is in the Epidermis? • Epithelial Tissue • Outer layer of dead cells • Melanocytes • Produce melanin – a dark brown pigment (color) • Pores

  10. What is in the Dermis? • Living cells • Blood vessels • Hair follicles • Nerve endings • Muscles • Glands

  11. The Two Main Glands in Skin • Sweat glands • Release sweat to cool body • Sebaceous (oil) glands • Keeps skin soft • Waterproof skin • Protect against germs

  12. Muscles in Skin??? • The tiny muscles attached to hair follicles cause “goose bumps” when they contract and pull the hair upright

  13. What is in the Subcutaneous Layer??? • Fat • Connective tissue • Blood vessels

  14. The job of the subcutaneous layer • To cushion the body’s internal organs from blows and bumps

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