Term
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Definition
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Term
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Definition
| Skin, Hair, Nails, Exocrine Glands |
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Term
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Definition
Protection
Excretion
Maintain Body Temperature
Synthesize Vitamen D3 (calcitrol
Nutrient storage
sensory |
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Term
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Definition
Epidermis
dermis
subcutaneous layer |
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Term
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Definition
controls calcium levels in blood
excess calcium stored in bones |
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Term
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Definition
| Stratified Squamous epithelial cells (keratinocytes) |
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Term
| 5 layers of epidermis (top to bottom) |
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Definition
*Stratum Corneum
*Stratum Luciderm
*Stratum granulosum
*Stratum Spinosum
*Stratum Germinativum |
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Term
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Definition
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Term
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Definition
| in thick skin (palms/feet) |
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Term
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Definition
3-5 cells thick (not dividing)
Keratohyalin and keratin |
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Term
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Definition
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Term
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Definition
*Basal cells or Merkel cells
*Attached to dermis at basement membrane
*Blood vessels on bottom of germ level |
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Term
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Definition
waterproof protein
flexible |
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Term
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Definition
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Term
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Definition
Color
*orange pigment can convert to vitamin A for epithelial
*Maintenance and synthesis of photoreceptors in eye |
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Term
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Definition
*Melanocytes in s. germinativum produce melanin from AA tyrosine
*Melanin transferred to keratinocytes in vacuoles
*Melanin protects from UV rays |
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Term
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Definition
*Papillary Layer
*Reticular Layer |
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Term
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Definition
*top part of dermis
*Capillaries and sensory neurons |
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Term
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Definition
*Protein fibers and accessory organs
*Hair, nails, sweat glands, sebaceous glands, sensory neurons |
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Term
| Subcutaneous Layer (hypodermis) |
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Definition
*stabilizes skin to underlying tissues
*Abundant fat cells for insulation, shock absorbance, vitamin and energy storage |
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Term
Accessory Structures ->
Hair |
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Definition
*Hair projects from surface
*produced in hair follicle
*Hair cells produced at bottom of hair shaft (keratin and pigment added) |
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Term
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Definition
*Nerves surrounding = sensory
*Protection (extended surface)
*arrector pili contract to increase body temperature |
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Term
| Glands -> Subaceous glands |
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Definition
*Secrete sebum = lubricates and inhibits bacterial growth
*May become blocked and invaded by pathogens to form boils or acne |
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Term
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Definition
*Apocrine merocrine
*Apocrinve at armpits, groin, and nipples
*Merocrine act as cooling agent, excrete metabolic waste, inhibit bacterial growth |
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Term
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Definition
*Protects ends of fingers and toes
*Highly compact, keratinized, dead cells |
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Term
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Definition
*Capillaries help body temperature
*Dilation to release heat
*Contraction to conserve heat |
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Term
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Definition
| How cells grow(haha follow the fabric grain) |
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Term
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Definition
*Epidermis germ layer slows down increasing chance of injury
*Melanocytes decrease activity
*Blood supply to surface decreases
*Skin repair slows
*Gland activity decreases
*Vitamin D(sub 3) production decreases |
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