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


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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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slide1

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
Split pg. 50 into 4 squares

Epidermis

Skin Layers

Tree Map: Epidermis and Dermis

  • Video Notes
  • 15 bullets
layers of skin
Layers of Skin

The skin includes 2 distinct tissue layers:

  • 1. Epidermis
  • 2. Dermis
  • Subcutaneous layer or hypodermis
    • beneath dermis
    • NOT part of skin
slide4

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
slide5

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?)
slide6

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
epidermis
Epidermis
  • Layers of Epidermis
    • stratum corneum
    • stratum lucidum
    • stratum granulosum
    • stratum spinosum
    • stratum basale
slide9

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
slide10

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!!!!!
slide11

Video:

The Tattoo Removal Process

subcutaneous layer
Subcutaneous Layer
  • NOT part of the skin
  • Binds the skin to underlying organs
  • Insulates
  • Composed of:
    • loose connective tissue
    • adipose tissue
    • major blood vessels
slide15

Video:

The Layers of the Human Skin

  • Please add information to your pictures from the video

-Layer of dead fat tissue