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The Skin
- 1. Good Blood and Nerve Supply
- 2. Organ
- 3. Deals with the Epithelial, Hair, Nails, Glands, oil
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The region Epidermis
- 1. Stratified Squamous Epithelium
- 2. No blood supply
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The Region of Dermis in the Skin
- 1. Dense connective Tiusse
- 2. Good blood supply
- 3. Mypodermis is below the dermis (fat)
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Epidermis Cell types
- 1. Keratinocytes
- 2. Melanocytes
- 3. Dendric Cells ( Langerhans Cells)
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Epidermis Cell Type
Keratinocytes
- 1. The majority of cells
- 2. Always loosing because we flush away
- 3. break layer could cause infection
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Epidermis Cell Type
Melanocytes
- 1. synthesize pigment melanin
- 2. Melanin moves outside to Keratinocytes and spreads, becomes darker
- 3. Ultraviolet light causes the cell to open up its DNA and prodce Melanin
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Epidermis CEll Type
Dendritic Cells
- 1. Langerhans cells
- 2. Macrophage like cells that protect by phagocytosis
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Layers of the Epidermis
Strat
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Layers of the Epidermis
Forms of Skin
- 1. Thick skin, over palms and heals 5 layers
- 2. Thin skin, ove rmostof the body 4 layers
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Layers of Epidermis Strata
- 1. Stratum corneum
- 2. Stratum lucidum
- 3. Stratum grandulosum
- 4. Stratum spinosum
- 5. Stratum basal
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Layers of the Epidermis
Stratum Basal
- 1. Deepest layer
- 2. Single row of cells (Keratin and Melanin CYTES)
- 3. more cell division, with division can come problems
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layers of the Epidermis
Stratum Spinosum
- 1. Spiny apperance
- 2. Serval rows
- 3. Keratinocytes and Langerhans cells (slow down cell division)
- 4.CElls start to die after this layer
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Layers of Epidermis
Stratum Grandulosum
- 1. Grandular cytoplasm, grainy keratinocyte
- 2. 2-3 rows
- 3. KERATINIZATION begins here, see visable keratin cells
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Layers of Epidermis
Stratym Lucidum
- 1. Clear
- 2. Few rows of flattened cells
- 3. Callous
- 4. THICK SKIN ONLY
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Layers of Epidermis
Stratum corneum
- 1. outtermost
- 2. 20-30 rows
- 3. cells filled with keratin
- 4. DEAD
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Layers of Epidermis
- 1. outtermost
- 2. 20-30 rows
- 3. cells filled with keratin
- 4. DEAD
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Which is always made in the strata of Epidermis?
Keratin NOT Melanin
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What is Dermis?
Strong yet flexible skin layer
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What are the two layers in Dermis?
- 1. Papillary layer
- 2. Reticular layer
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Dermis layer Papillary
- 1. areolar loose CT
- 2. serface folded into ridgest (papillae)
- 3. Finger print
- 4. Good Blood supply and Nerve supply
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Layer of Dermins
Reticular layer
1. Dense irregular CT that impacts strength
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Skin color is due to?
Pigment
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Skin color pigments
- 1. Melanin
- 2. Hemoglobin
- 2. Carotene
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Skin color pigment
Melanin
1. amount and type related to skin color
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Skin color pigment
Hemoglobin
1. due to iron. Blood pigment
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Skin color pigment
Carotene
1. Yellowish pigment mostly in hypodermis
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