integumentary system

integumentary system - Chapter 4: Integumentary System...

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Unformatted text preview: Chapter 4: Integumentary System Objectives: Describe the structure of the cutaneous membrane and various associated accessory structures Discuss the following topics as they relate to integumentary function: Determination of skin color Provision of an effective barrier Vitamin D production Glandular secretions Several diseases of the integument, including cancer Anatomy of Skin Integumentary System consists of: Cutaneous Membrane (has 2 layers) Epidermis Epidermis (stratified squamous epithelial tissue) multiple layers Dermis Dermis (connective tissue) 2 layers Accessory structures Hair Nails Glands Sensory structures Hypodermis (connective tissue) Anatomy of Skin Integumentary System Overview Epidermis Stratified squamous epithelial tissue Main cell type = KERATINOCYTE KERATINOCYTE Make a protein called keratin keratin Can be 4 (thin skin) or 5 (thick skin) layers [called strata ] Epidermis Layers (strata): Epidermis Layers (strata): GERMINATIVUM/BASALE Basal cells Basal cells (stem cells) replenish keratinocytes of upper layers Melanocytes synthesize pigment melanin Epidermis Layers (strata): SPINOSUM Dividing and non-dividing keratinocytes Langerhans cells (immune cells) Melanocytes Epidermis Layers (strata): GRANULOSUM Keratinocytes produce lots of...
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This note was uploaded on 04/05/2009 for the course BIOL 252 taught by Professor Johnson during the Spring '07 term at UNC.

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integumentary system - Chapter 4: Integumentary System...

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