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Sponge: Set up Cornell Notes on pg. 50 Topic: Ch. 6 Integumentary System: Layers of the Skin

6.3 Layers of the Skin. 2.1 Atoms, Ions, and Molecules. Sponge: Set up Cornell Notes on pg. 50 Topic: Ch. 6 Integumentary System: Layers of the Skin Essential Question :. Split pg. 50 into 4 squares. Epidermis . Skin Layers . Tree Map: Epidermis and Dermis . Video Notes 15 bullets.

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Sponge: Set up Cornell Notes on pg. 50 Topic: Ch. 6 Integumentary System: Layers of the Skin

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  1. 6.3 Layers of the Skin 2.1 Atoms, Ions, and Molecules Sponge: Set up Cornell Notes on pg. 50 Topic: Ch. 6 Integumentary System: Layers of the Skin Essential Question:

  2. Split pg. 50 into 4 squares Epidermis Skin Layers Tree Map: Epidermis and Dermis • Video Notes • 15 bullets

  3. Layers of Skin The skin includes 2 distinct tissue layers: • 1. Epidermis • 2. Dermis • Subcutaneous layer or hypodermis • beneath dermis • NOT part of skin

  4. Epidermis • Made up of stratified squamous epithelium • Lacks blood vessels • is nourished by dermal blood vessels • As new cells grow- • push old cells farther from nutrient supply and they die • Become keratinized- hardens, becomes waterproof • Eventually shed

  5. Thickest on palms and soles of feet • Thin everywhere else (0.07-0.12mm thick) • Cell division is higher in areas where skin is rubbed or pressed regularly (Hypothesize why?)

  6. Melanocytes- specialized cells that produce the dark pigment melanin • Provides skin color • Absorbs UV rays • Prevents mutations in the DNA or skin cells and other damaging effects

  7. Epidermis • Layers of Epidermis • stratum corneum • stratum lucidum • stratum granulosum • stratum spinosum • stratum basale

  8. Dermis • Binds epidermis to underlying tissues • on average 1.0-2.0mm thick • Composed of: • irregular dense connective tissue • muscle cells • nerve cell processes • specialized sensory receptors • blood vessels • hair follicles • glands

  9. Tattoos • Ink injected into the dermis • Color is permanent • Dermis cells are not shed! • Tattoo Removal • Lasers shatters ink molecules • Immune system removes debris • Before lasers, tattoos were scraped, frozen, or cut away • PAINFUL!!!!!

  10. Video: The Tattoo Removal Process

  11. Subcutaneous Layer • NOT part of the skin • Binds the skin to underlying organs • Insulates • Composed of: • loose connective tissue • adipose tissue • major blood vessels

  12. Got Cellulite?

  13. Video: The Layers of the Human Skin • Please add information to your pictures from the video -Layer of dead fat tissue

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