Topic 5 integumentary_presentation 2009

Topic 5 integumentary_presentation 2009 - The Integumentary...

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The Integumentary System ± The skin and its derivatives (sweat and oil glands, hair and nails) Gross and microscopic anatomy of the skin Anatomy and functional roles of accesory structures
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Overview ± Skin is the largest organ of the body with various thickness Thin skin 0.004 - 0.006 inch Thick skin 0.18 inches ± Has two layers 1. Epidermis ± Type of tissue? ± Functions? 2. Dermis ± Type of tissue? ± Functions?
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Keratinocytes. ± Function: ± Are “born” in stratum basale. ± Dead keratinocytes exfoliate Cells of Langerhan’s (dendritic) Macrophages Function: Merkel cells At epidermal-dermal junction Function: Melanocytes Epithelial cells in deepest layers. Function: Cellular components
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Layers of the Epidermis
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The epidermis ± Is multi-tiered ± Basal layer (most inferior) One layer of cells Forms new keratinocytes ± Spinous layer Cells shrink during histological preparation ± Granular layer Disintegrating cells Have granules (keratohyaline and lamellated) ± Clear (lucidum) layer Present only in thick skin (palms and soles of feet) Has dead cells ± Corneum Multiple layers of dead cells that exfoliate
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Thick vs. thin skin ± Thick skin More epidermal cells 5 layers More sweat glands
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This note was uploaded on 06/05/2011 for the course KINS 2531 taught by Professor Sturges during the Spring '11 term at Georgia Southern University .

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Topic 5 integumentary_presentation 2009 - The Integumentary...

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