Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 5-4 The Subcutaneous Layer
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Stabilizes skins position against underlying organs and tissues Hypodermis
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 5-5 Accessory Structures
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Originate in hair follicle Composed of root and shaft Root base (hair papilla) surrounded by hair bulb and root hair plexus Hairs have soft medulla and hard cortex Cuticle = superficial dead protective layer Hairs
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.9 the Anatomy of a Single Hair Figure 5.9
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Vellus hairs (peach fuzz) Terminal hairs ( heavy) Club hair (cessation of growth) Shed and grow according to hair growth cycle Arrector pili muscle attaches to hair Hair types
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.10 Hair Follicles Figure 5.10a-c
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Sebaceous Suderiferous Mammary Ceruminous Glands in the skin
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Discharge waxy sebum onto hair shaft when associated with hairs Sebaceous follicles discharge onto epidermal surface Sebaceous glands
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.11 Sebaceous Glands and Follicles Figure 5.11
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Apocrine sweat glands Produce odorous secretion Merocrine (eccrine) sweat gland Sensible perspiration Suderiferous glands
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.12 Sweat Glands Figure 5.12a, b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Mammary glands Structurally similar to apocrine sweat glands Ceruminous glands In ear, produce waxy cerumen Other glands
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Nail body covers the nail bed Nail production occurs at the nail root Eponychium (cuticle) overlies root Free edge of nail extends over hyponychium Nails
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.13 The Structure of a Nail Figure 5.13
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 5-7 Local Control of Integumentary Function
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Regenerates easily Regeneration process includes formation of Scab Granulation tissue Scar tissue Injury and repair
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.14 Integumentary Repair Figure 5.14, step 1-2
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 5.14 Integumentary Repair Figure 5.14, step 3-4
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 5-7 Aging and the Integumentary System
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Integument thins Blood flow decreases Cellular activity decreases Repairs occur more slowly With age
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The components of the integumentary system, including their physical relationships. The functions of the integumentary system. The main features and functions of the epidermis and dermis. Individual and racial differences in skin. The effects of UV light on the epidermis. The structure and function of the various accessory organs of the skin. How the skin responds to aging. You should now be familiar with: