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Cards In This Set
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The integument is made up of two parts, what are they and what do they consist of?
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-Cutaneous membrane (skin): Epidermis, Dermis-Accessory structure (hair, nails and multicellular exocrine glands)
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What are the 7 functions of the integument?
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-Protection-Excretion of salts, water, and organic wastes-Produce melanin and keratin-Synthesis of Vitamin D3-Storage of lipids-Sensory reception of touch, pressure, pain, temperature-Maintenance of normal body temperature
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What is the hypodermis layer?
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The layer of loose connective tissue below the dermis; also called subcutaneous layer or superficial fascia
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Epidermis concise of ______ ______ epithelium.
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Stratified squamous
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What is melanin?
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It is brown pigment in the skin which protects the underlying tissue from ultraviolet radiation. The more you have of this substance, the darker you are
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What is keratin?
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It is a protein which protects against abrasion and severs as a water repellent.
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What are the 5 strata of keratinocytes in thick skin?
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-Stratum basale-Stratum spinosum-Stratum granulosum-Stratum lucidum-Stratum corneum
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Describe thin skin?
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It is on most of the body and it contains four layers of keratinocytes.
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Describe thick skin?
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Is like thin skin but has an extra layer: status lucidum. Also it has a thicker superficial layer, status corneum
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What are the 2 pigmentations found in the epidermal?
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1.Carotene - 2.Melanin -
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Skin colour is influenced by what 2 things?
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-epidermal pigments-dermal circulation
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Where is the dermis located?
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Between the epidermis and the subcutaneous layer
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What does the dermis help anchor?
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Accessory structures (hair, nails and multicellular exocrine glands)
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What are the 2 components of the dermis layer?
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-(outer) Papillary layer-(deep) Reticulum layer
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The presence of what gives the dermis strength and elasticity?
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-Collagen Fibers - very strong and resist stretching; limit flexibility of elastic fiber so that tissue does not damage.-Elastic Fibers - very flexible; can easily twist and bend
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