Chapter 7 - Chapter 7 The Integumentary System 1...

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Chapter 7 The Integumentary System 1
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l Protection l Excretion l Temperature maintenance l Insulation and cushion l Vitamin D3 synthesis l Sensory detection Integumentary system functions: 2
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l Cutaneous membrane ¡ Epidermis ¡ Dermis l Accessory structures l Subcutaneous layer ¡ It is not part of the integumentary system ¡ It separates the integumentary system from the deep fascia ¡ Also known as hypodermis and superficial fascia The integumentary system consists of 3
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Integumentary System 4
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The Epidermis 5
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Cells of the epidermis l Keratinocytes ¡ Most abundant ¡ Produce keratin l Fibrous protein that makes the epidermis though and water resistant l Melanocytes ¡ Secretes melanin l Protects the cell against UV rays ¡ freckles 6
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Cells of the epidermis l Langerhan’s cells ¡ Cells that belong to the immune system l Merkel cells ¡ Merkel discs = Merkel cell + nerve ending ¡ Sense of touch 7
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l Stratum germinativum or basale l Stratum spinosum l Stratum granulosum l Stratum lucidum l Stratum corneum Layers of the epidermis: 8
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Layers of the Epidermis 9
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Chapter 7 - Chapter 7 The Integumentary System 1...

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