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18 Cards in this Set
- Front
- Back
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What are the parts of the Integument system?
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Cutaneous membrane (skin) and accessory structures
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What is the largest system of the body?
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Integument
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What are the parts of the cutaneous membrane?
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Outer epidermis (epithelial tissues) and inner dermis (connective tissues)
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Where are the accessory structures?
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Originate in the dermis, extend through the epidermis to skin surface (hair, nails, & multicellular exocrine glands)
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What 2 systems are connected to the accessory structures?
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Circulatory system (blood vessels in the dermis ) Nervous system (sensory receptors for pain, touch & temperature)
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What is the subcutaneous layer?
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Loose connective tissue, below the dermis, location of hypodermic injections.
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What are the 6 functions of the skin?
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Protects underlying tissues and organs, excretes salts, water, and organic wastes (glands), maintains body temperature (insulation and evaporation), synthesizes vitamin D3, stores lipids, and detects touch, pressure, pain, and temperature.
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What is the main structure of the epidermis?
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Avascular stratified squamous epithelium
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What are the functions of the epidermis?
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Nutrients and oxygen diffuse from capillaries in the dermis.
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What kind of cells are in the epidermis?
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Keratinocytes
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What are the most abundant cells in the epidermis?
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Keratinocytes
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Where are keratinocytes found?
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Thick skin - Covers the palms of the hands and soles of the feet (has 5 layers of keratinocytes.
Thin skin - covers most of the body. (has 4 layers of keratinocytes) |
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What are the 5 layers of the epidermis?
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Stratum germinativum,
stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin) stratum corneum. |
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These are the 5 strata of keratinocytes in ?
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Thick skin
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These 5 layers go from the ? to the ?
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basal lamina to the free surface
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The stratum germinativum is also called what?
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the "germinative layer".
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Describe the stratum germinativum (germinative layer).
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Had many germinative (stem) cells or basal cells,
Attached to basal lamina by hemidesmosomes Forms a strong bond between epidermis and dermis. |
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What are the structures of stratum germinativum?
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Epidermal ridges (fingerprints)
Dermal papillae (tiny mounds) |
