6-1

Hole’s HumanAnatomy and Physiology

Hole’s HumanAnatomy and Physiology

Chapter 6Skin and the Integumentary System

Chapter 6Skin and the Integumentary System

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Layers of the Skin

Epidermis

Dermis

Subcutaneous Layer

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EpidermisKeratinized Stratified Squamous Epithelium

Lacks Blood Vessels

Thickest on Palms And Soles

Melanocytes Provide Melanin

Rests on Basement Membrane

6-4

Epidermis

Layers Of Epidermis Stratum Corneum

Stratum Lucidum

Stratum Granulosum

Stratum Spinosum

Stratum Basale

6-5

Average 1-2mm Thick

Dermal Papillae

Binds Epidermis to

Underlying Tissues

Irregular Dense

Connective Tissue

Muscle Cells

Nerve Cell Processes

Blood Vessels

Hair Follicles

Glands6-6

Dermis

Hypodermis

Loose Connective Tissue

Adipose Tissue

Insulates

Major Blood Vessels6-7

Subcutaneous Layer

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

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Nails

Protective Coverings

Nail Plate

Nail Bed

Lunula

6-9

Sebaceous GlandsUsually Associated with Hair Follicles

Holocrine Glands

Secrete Sebum

Absent on Palms and Soles

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Sweat GlandsSudoriferous Glands

Widespread In Skin

Deeper Dermis

Or Hypodermis

Eccrine Glands

Apocrine Glands

Ceruminous Glands

Mammary Glands

6-11

Regulation Of Body Temperature

6-12

Problems In Temperature Regulation

Hyperthermia Abnormally High Body Temperature

Hypothermia Abnormally Low Body Temperature

6-13

6-14

Skin Color

Healing Of Cuts

6-15

Healing Of BurnsFirst 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

Rule Of Nines

6-17

Life Span Changes

6-18

Clinical Application

6-19

Acne VulgarisMost Common Skin DisorderSebum And Epithelial Cells Clog GlandsProduces Whiteheads And Blackheads (Comedones)Anaerobic Bacteria Trigger Inflammation (Pimple)Largely Hormonally InducedAndrogens Stimulate Sebum ProductionTreatments Include Antibiotics, Topical Creams, Birth Control Pills