INTEGUMENTARY SYSTEM. COMPONENTS OF THE INTEGUMENTARY SYSTEM Figure 5-1.
Integumentary System
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Transcript of Integumentary System
![Page 1: Integumentary System](https://reader030.fdocuments.us/reader030/viewer/2022032605/56812c7c550346895d912396/html5/thumbnails/1.jpg)
Integumentary SystemSkin Disorders and Diseases
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Contact Dermatitis (p 172)
• Inflammation of the skin
• Immune induced or irritating substance
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Laundry Detergent reaction
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Pituitary Tumors
• Abnormal skin pigmentation
• Deep bronze tan• Increase secretion of
MSH: melanocyte-stimulating hormones
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Jaundice • Abnormal Skin pigmentation
• Excess bilirubin in the blood. (Bilirubin is produced by the normal breakdown of red blood cells. Normally bilirubin passes through the liver and is excreted as bile through the intestines)i
• Jaundice occurs when bilirubin builds up faster than the liver can break it down and pass it from the body.
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• Vitiglio:– loss of
melanocytes– loss of color
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Decubitus Ulcers
• Bed sores• Occurs from pressure
on superficial blood vessels
• Lack of circulation kills epidermal cells
(p172)
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Baldness• Androgenic alopecia
– Associated with testosterone
• Alopcecia areata – Blood makes
antibodies that attack hair follicles
• Causes: estrogen levels, medicines, high fever.
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Skin Cancers
• UV radiations causes mutation in the DNA of a skin cell
• 75% of cancers are skin cancers
• Most common cancers are caused by prolonged exposure to UV radiation from sunlight
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Types of Skin Cancer• Three major types:
– Basal Cell Carcinoma• Most common type of skin cancer
• 2/3 of these cancers appear from chronic UV exposure
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Skin cancer– Squamous cell carcinoma
• Frequent in light, pale skin over 40 years old
• Slow growing
• Surgical removal or radiation
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Skin Cancer– Malignant Melanoma
• Arise from melanocytes
• Usually in trunk of body and from a mole
• Hard to treat
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Basal Cell Carcinoma
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Squamous Cell Carcinoma
Originates from epithelial cells
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Malignant Melanoma
Difficult to treat due to fast growing and invasion of deep tissues
Risk increases with short, intermittent exposure to high-intensity sunlight.
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Do you have Moles?Watch SUN Exposure!
• A-asymmetry
• B-Border
• C-Color
• D-diameter
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• Cyanosis– Bluish skin tint– Caused by severe reduction in blood flow or
oxygenation• Jaundice:
– buildup of bile produced by liver– yellow color
• Addison’s disease:– and other diseases of pituitary gland– skin darkening
• Vitiglio:– loss of melanocytes– loss of color