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Unveiling the Integumentary System: The Skin's Vital Functions and Components

Explore the intricacies of the integumentary system, the body's largest organ system, encompassing the skin, hair, nails, and more. Learn about its protective role against infections and injury, regulation of body temperature, and prevention from harmful UV radiation. Delve into the three layers of the skin - epidermis, dermis, and subcutaneous tissue - and understand the functions of each. Discover the significance of hair and nails in shielding the body and the potential risks like skin cancer, emphasizing the importance of sunscreen for protection.

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Unveiling the Integumentary System: The Skin's Vital Functions and Components

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  1. Integumentary System

  2. The Skin • The largest organ system of any animal by surface area

  3. Includes • Skin • Hair • Nails • Feathers • Scales • Sweat glands and their products

  4. Functions • Protection against infection and injury. • Regulate body temperature • Remove waste products • Protect from ultraviolet radiation from sun.

  5. Components • Cutaneous membrane- the skin • Accessory structures- • Hairs, scales, feathers, nails, sweat glands

  6. Three Layers of Skin • Epidermis: 2 layers • Outer layer: made of dead cells • Inner layer: made of living cells • Outer layer is shed every 4-5 weeks.

  7. Three Layers of Skin • Dermis: Inner layer of the skin. • Regulates body temperature. • Contains two major types of glands: • Sweat glands-regulates body temperature. • Sebaceous glands-keeps dermis flexible and water proof

  8. Three Layers of Skin • Subcutaneous tissue: The subcutaneous tissue is a layer of fat and connective tissue containing larger blood vessels and nerves. • Important in the regulation of temperature of the skin itself and the body. The size of this layer varies throughout the body and from person to person.

  9. Hair and Nails • Hair: Protects skin from UV radiation, prevents dirt and other particles from entering the body. • Nails: Protects the tips of fingers and toes. Grow an average of 3mm per month.

  10. Diseases • Skin Cancer: Abnormal growth of cells in the skin. • Sunscreen is best protection against skin cancer.

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