Chapter 5 Integumentary System

Chapter 5 Integumentary System - Chapter 5 Integumentary...

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Chapter 5 Integumentary System Integumentary System Consists of: Skin Hair Nails Glands Functions Protection Sensation Temperature regulation Vitamin D production Excretion Hypodermis Skin rests on this, but not a part Consists of loose connective tissue Types of cells Fibroblasts Adipose cells Macrophages Also called Subcutaneous tissue Superficial fascia Skin Dermis Structural strength Cleavage lines Two layers Reticular Papillary Epidermis Avascular Cells Layers or strata Cleavage or Tension Lines Elastin and collagen fibers oriented in some directions more than others Important in surgery If incision parallel to lines there is less gapping, faster healing, less scar tissue Dermis and Epidermis Epidermal Cells Cell types
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Keratinocytes: Produce keratin for strength Melanocytes: Contribute to skin color Langerhans’ cells: Part of the immune system Merkel’s cells: Detect light touch and pressure Desquamate: Older cells slough off Keratinization: Cells die and produce outer layer that resists abrasion and forms permeability layer
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This note was uploaded on 06/06/2011 for the course BIO 180 taught by Professor Sarahbales during the Spring '11 term at Moraine Valley Community College.

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Chapter 5 Integumentary System - Chapter 5 Integumentary...

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