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Chapter 6 Skin and the Integumentary System

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Presentation on theme: "Chapter 6 Skin and the Integumentary System"— Presentation transcript:

1 Chapter 6 Skin and the Integumentary System
Hole’s Human Anatomy and Physiology 6-1

2 Chapter 6 Skin and the Integumentary System
Composed of Several Tissues Maintains Homeostasis Protective Covering Retards Water Loss Regulates Body Temperature Houses Sensory Receptors Contains Immune System Cells Synthesizes Chemicals Excretes Small Amounts Of Waste 6-2

3 Layers of the Skin Epidermis Dermis Subcutaneous Layer 6-3

4 Epidermis Keratinized Stratified Squamous Epithelium Lacks Blood Vessels Thickest on Palms And Soles Melanocytes Provide Melanin Rests on Basement Membrane 6-4

5 Epidermis Layers Of Epidermis Stratum Corneum Stratum Lucidum
Stratum Granulosum Stratum Spinosum Stratum Basale 6-5

6 Dermis Average 1-2mm Thick Dermal Papillae Binds Epidermis to Underlying Tissues Irregular Dense Connective Tissue Muscle Cells Nerve Cell Processes Blood Vessels Hair Follicles Glands 6-6

7 Subcutaneous Layer Hypodermis Loose Connective Tissue Adipose Tissue Insulates Major Blood Vessels 6-7

8 Hair Follicles Epidermal Cells Tube-like Depression Extends into Dermis Hair Root Hair Shaft Hair Papilla Dead Epidermal Cells Melanin Arrector Pili Muscle 6-8

9 Nails Protective Coverings Nail Plate Nail Bed Lunula 6-9

10 Sebaceous Glands Usually Associated with Hair Follicles Holocrine Glands Secrete Sebum Absent on Palms and Soles 6-10

11 Sweat Glands Sudoriferous Glands Widespread In Skin Deeper Dermis Or Hypodermis Eccrine Glands Apocrine Glands Ceruminous Glands Mammary Glands 6-11

12 Regulation Of Body Temperature

13 Problems In Temperature Regulation
Hyperthermia Abnormally High Body Temperature Hypothermia Abnormally Low Body Temperature 6-13

14 Skin Color Genetic Factors Varying Amounts Of Melanin Varying Size Of Melanin Granules Albinos Lack Melanin Environmental Factors Sunlight X Rays UV Light From Sunlamps Physiological Factors Dilation of Dermal Blood Vessels Constriction of Dermal Blood Vessels Carotene Jaundice 6-14

15 Healing Of Cuts 6-15

16 Healing Of Burns First Degree Burn Superficial Partial-thickness Second Degree Burn Deep Partial-thickness Third Degree Burn – Full-thickness Autograft Homograft Various Skin Substitutes Extensive Scars 6-16

17 Rule Of Nines 6-17

18 Life Span Changes Scaly Skin Age Spots Dermis Becomes Reduced Loss of Fat Wrinkles Sagging Sebaceous Glands Secrete Less Oil Melanin Production Slows Hair Thins Number of Hair Follicles Decrease Impaired Nail Growth Sensory Receptors Decline Inability to Control Body Temperature Less Vitamin D Production 6-18

19 Clinical Application Acne Vulgaris 6-19 Most Common Skin Disorder
Sebum And Epithelial Cells Clog Glands Produces Whiteheads And Blackheads (Comedones) Anaerobic Bacteria Trigger Inflammation (Pimple) Largely Hormonally Induced Androgens Stimulate Sebum Production Treatments Include Antibiotics, Topical Creams, Birth Control Pills 6-19

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