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7 Cards in this Set
- Front
- Back
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Skin |
Epidermis Dermis Hypodermis |
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Function |
Protection from injury, fluid loss, microorganisms Vitamin D sythesis Temperature regulation Fluid balance - excretion Sensation |
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Epidermis (4 or 5) layers called stratum |
1. Stratum Corneum - horny layer; outermost layer; dead, keratinized cells 2. Stratum Lucidum - clear layer (only on palms and soles) 3. Stratum Granulosum - granular layers of cells 4. Stratum Spinosum - composed of prickle cells 5. Stratum Basale - deepest of the 5 layers, made of basal cells |
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Dermis 2 layers |
1. Stratum Papillare - thin superficial layer of areolar tissue interlocked with the epidermis 2. Stratum Reticulare - thick layer of dense, irregular connective tissue |
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Dermis contains many important structures |
Vessels carrying blood and lymph Nerves and nerve endings Glands Hair follicles |
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Hypodermis/subcutaneous tissue (not a layer of skin) |
Subcutaneous tissue that dermis lies on Mostly composed of adipose tissue + some areolar tissue (loose connective tissue meshwork of collagen, elastic tissue, and reticular fibers) Fibrous connective tissue (superficial fascia) included in this layer |
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Hypodermis Function |
Protection to the underlying structures Prevent loss of body heat Anchor the skin to the underlying musculature |
