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Chapter 5 Integument

Chapter 5 Integument. Hair Follicle Review. Nails. Scale-like modifications of epidermis that forms clear protective covering on dorsal surface of distal portion of finger and toe Hard Keratin Refer to Picture . Sweat Glands . Apocrine – armpits, groin, associated with a hair follicle.

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Chapter 5 Integument

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  1. Chapter 5 Integument

  2. Hair FollicleReview

  3. Nails • Scale-like modifications of epidermis that forms clear protective covering on dorsal surface of distal portion of finger and toe • Hard Keratin • Refer to Picture

  4. Sweat Glands • Apocrine – armpits, groin, associated with a hair follicle • Eccrine- most numerous, found on palms and feet • Sweat- 99% water • Modifications- mammary glands (milk)

  5. Cutaneous Sensation • Skin is richly supplied with cutaneous sensory receptors that are a part of the nervous system • Respond to stimuli happening outside the body

  6. Examples • Meissner’s corpuscles & Merkel Discs • Allow us to feel our clothing moving against our skin • Pacinian receptors- alert us to bumps or contacts that involve deep pressure

  7. Skin Disorders • The skin can develop more than 1000 different conditions and ailments • Most Common: bacterial, viral, or yeast infections

  8. Skin Cancer • Main cause is from overexposure to UV rays from the sun • 3 Types: • 1. Basal Cell Carcinoma • 2. Squamous Cell Carcinoma • 3. Melanoma

  9. Basal Cell Carcinoma • Most Common • (Over 30% of white people get this in their lifetime) • Least Malignant • Slow growing

  10. Squamous Cell Carcinoma • Arises from the keratinocytes • Scaly reddened elevation that arises most often on the head (scalp, ears, and lower lip), and hands • Grows rapidly

  11. Melanoma • Cancer of the melanocytes • Most dangerous skin cancer • Least common- only about 5% • Can occur wherever there is pigment • Key to surviving is Early Detection

  12. ABCD RULE • A= Asymmetry (sides do not match) • B= Border irregularity (rough border) • C= Color (several colors) • D= Diameter (larger than 6 mm) • E= elevation (above skin surface)

  13. BURNS • Partial Thickness Burns • 1st Degree • 2nd Degree • Full Thickness Burns • 3rd Degree

  14. Partial Thickness Burns • 1st Degree • Characteristics- only epidermis is damaged, a sunburn is usually 1st degree burn • Treatments- usually heal in 2 to 3 days without special treatment • Complications- redness, swelling, pain

  15. Partial Thickness Burns (Cont) • 2nd Degree • Characteristics- injures the epidermis and the upper region of the dermis • Treatments- skin regeneration will occur within 3 to 4 weeks if care is taken to prevent infection • Complications- symptoms same as 1st degree with blisters also appearing

  16. Full Thickness Burns • 3rd Degree • Characteristics- burns entire thickness of the skin • Treatments- skin grafting is usually necessary to prevent fluid loss and infection • Complications- area will appear gray-white, cherry red, or blackened; nerve endings have been destroyed so it is not painful

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