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Chapter 5 Integument - PowerPoint PPT Presentation


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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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nails
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
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)
cutaneous sensation
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
examples
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
skin disorders
Skin Disorders
  • The skin can develop more than 1000 different conditions and ailments
  • Most Common: bacterial, viral, or yeast infections
skin cancer
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
basal cell carcinoma
Basal Cell Carcinoma
  • Most Common
  • (Over 30% of white people get this in their lifetime)
  • Least Malignant
  • Slow growing
squamous cell carcinoma
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
melanoma
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
abcd rule
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)
burns
BURNS
  • Partial Thickness Burns
    • 1st Degree
    • 2nd Degree
  • Full Thickness Burns
    • 3rd Degree
partial thickness burns
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
partial thickness burns cont
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
full thickness burns
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