Welcome back to

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Welcome back to
Your Living Body
Unit 4 Skin Body Membranes
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Tonights Program

• I. Skin Function
• I. Skin Anatomy
• A. Epidermis
• B. Dermis
• II. Skin Diseases
• A. Mechanical Destruction
• B. Infections
• C. Cancer

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Tonights Program expanded

• I. Skin Function
• I. Skin Anatomy
• A. Epidermis
• B. Dermis
• II. Skin Diseases
• A. Mechanical Destruction
• 1. Burns
• 2. Lacerations
• 3. Abrasions
• B. Infections
• Bacterial
• Fungal
• Viral
• Parasitic
• C. Cancer
• 1. Squamous Cell Carcinoma
• 2. Basal Cell Carcinoma
• 3. Malignant Melanoma/ABC Rule

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Skin Function

• Protection
• Scrapes Chemicals
• H20 Proof
• Bacteria barrier
• Provides us with information about our
  environment
• Temperature Regulation
• Insulation
• Sweating
• A place to put ink

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The Integument
Slingin Ink
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Skin Anatomy
Epidermis
Dermis
Subcutaneous
Muscle
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Skin Anatomy
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Epidermis

• Strong
• Top Layer is Composed of Keratin
• Water Proof

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Dermis

• Blood vessels
• Nerves
• Sweat Glands
• Oil Glands
• Hair Follicles

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Skin Anatomy
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Clinical Implications

• I. Injection Sites
• II. Skin Diseases
• A. Mechanical Destruction
• 1. Burns
• 2. Lacerations
• 3. Abrasions
• B. Infections
• 1. Bacterial
• 2. Viral
• 3. Fungal
• 4. Parasitic
• C. Cancer
• 1. Squamous Cell
• 2. Basal Cell
• 3. Melanoma

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Injection Sites
Intradermal (TB skin)
Intravenous (Abx)
Subcutaneous (Insulin)
Intramuscular (IZ)
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Clinical Implications

• Mechanical Destruction
• 1. Burns
• 2. Lacerations
• 3. Abrasions

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Burn Classification
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Clinical Implications

• I. Skin Diseases
• A. Mechanical Destruction
• 1. Burns
• a. 1st degree Red, Some Pain
• b. 2nd degree Blisters, Worst Pain
• c. 3rd degree Eschar, No Pain

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Burns
1st Degree Red, Some Pain ex Sunburn 2nd
Degree Blisters, Most Pain ex Oven Burn 3rd
Degree Eschar, No Pain at burn Site ex
Electrical Burn
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Burn Review
1st Red, Some Pain 2nd Blisters, Worst
Pain 3rd Eschar, No Pain
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Burns
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Lacerations
Vertical disruption of the skin - Less pain
because fewer nerves involved
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Lacerations
Vertical disruption of the skin
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Abrasions
Road Rash
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Abrasions
Horizontal disruption of the skin - Much pain
because more nerves involved
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Skin Infections

• Bacterial
• Impetigo Staphylococcus Aureus
• Viral
• Herpes Simplex HSV-I HSV-II
• Fungal
• Tinea
• Capitis
• Corporis
• Cruris
• Pedis
• Parasitic
• Scabies

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Bacterial Infections
Impetigo Staphylococcus Aureus
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Viral Infections
Herpes Simplex Virus-I
HSV-I - Cold Sores - Permanent/Recurrent
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Viral Infections
Herpes Simplex Virus-II
HSV-II - Genital Lesions - Permanent/Recurrent
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Viral Infections
Herpes Simplex Virus-II
HSV-II - Genital Lesions - Permanent/Recurrent
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Viral Infections
Herpes Simplex Virus-II
HSV-II - Genital Lesions - Permanent/Recurrent
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Why is HSV Permanent?
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Why is HSV Permanent?
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Superficial Fungal Infections

• Tinea Capitis - Head - Dandruff
• Tinea Corporis - Body - Ringworm
• Tinea Cruris - Groin - Jock Itch
• Tinea Pedis - Feet - Athletes Foot

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Fungal Infections
Tinea Capitis - Dandruff
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Fungal Infections

• Tinea Corporis Ringworm
• Common
• Central clearing

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Fungal Infections
Tinea Cruris Jock Itch
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Fungal Infections
Tinea Pedis Athletes Foot
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Parasitic InfectionsScabies
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Parasitic InfectionsSarcoptes scabiei
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Skin Cancer

• Squamous Cell Carcinoma
• Basal Cell Carcinoma
• Malignant Melanoma

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Skin Cancer
Squamous Cell Carcinoma
Most common cancer there is Face other sun
exposed areas Elderly Not malignant, but
locally invasive
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Skin Cancer
Basal Cell Carcinoma
Pearl like appearance, with a vein traversing the
lesion Usually on the face Elderly Sun Exposure
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Skin Cancer
Malignant Melanoma

• Lethal
• ABCs of Melanoma
• Asymmetry
• Borders
• Color

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Malignant Melanoma
Lethal Upon Diagnosis with Metastases - 6 month
survival is less than 50.
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In Summary
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• I. Skin Anatomy
• A. Epidermis
• B. Dermis
• II. Skin Diseases
• A. Mechanical Destruction
• 1. Burns
• a. 1st degree
• b. 2nd degree
• c. 3rd degree
• 2. Lacerations
• 3. Abrasions
• B. Infections
• Bacterial
• a. Impetigo/staphylococcus aureus
• Fungal
• a. Tinea capitis
• b. Tinea corporis
• c. Tinea cruris
• d. Tinea pedis

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• I. Skin Anatomy
• A. Epidermis keratin layer
• B. Dermis blood, nerves glands
• II. Skin Diseases
• A. Mechanical Destruction
• 1. Burns
• a. 1st degree red skin, some pain, ex sunburn
• b. 2nd degree blisters, worst pain
• c. 3rd degree eschar, no pain
• 2. Lacerations vertical skin disruption, more
  blood, sutures
• 3. Abrasions horizontal skin disruption, more
  pain, dressing
• B. Infections
• Bacterial
• a. Impetigo - staphylococcus aureus
• Fungal
• a. Tinea capitis Dandruff
• b. Tinea corporis - Ringworm
• c. Tinea cruris - Jock itch
• d. Tinea pedis Athletes foot