The Integumentary System

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The Integumentary System
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Skin Facts
Largest organ in the body
Covers approximately 21 square feet (average
size adult)
Weighs about 8 lbs.
Waterproof, covered in thin layer of oil for
protection and to keep it soft and pliable
Skins purpose is to protect and regulate the
temperature of the body (through sweating and
goose bumps) and bodys first line of defense
against disease and infection.
Skin cells have a life span of 28 days
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Great Skin Vocab! Yippee!!
Homeostasis
the tendency of a system, especially the
physiological system of higher animals, to
maintain internal stability, owing to the
coordinated response of its parts to any
situation or stimulus tending to disturb its
normal condition or function.
Melanin
A pigment that gives the skin color and protects
the underlying layers against damage by
ultraviolet light produced by melanocytes in the
inner layer of the epidermis.
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Common Skin Problems

• Sunburn prolonged exposure to UV rays can lead
  to greater risk of skin cancer

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Common Skin Problems
What are the two types of UV rays?
How could you be exposed to UV rays?
Is all exposure to UV rays dangerous for you?
How much sun exposure is recommended per day?
Why?
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Common Skin Problems

• Acne caused by over secretion of sebum from oil
  gland, clogging hair follicles. Hormones can also
  play a role in causing acne. Pores skin can
  host bacteria which causes inflammation.

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Common Skin Problems

• Psoriasis caused by rapid growth of skin cells,
  chronic, genetic

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Common Skin Problems

• Cancers

Squamous Cell
Melanoma
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Common Skin Problems

• Cancers

Early Detection is the key! A asymmetry B
borders that are irregular C color variations D
diameter of a pencil eraser
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Common Skin Problems

• Athletes Foot

Ringworm
Fungal infection (tinea)
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References

• http//www.emc.maricopa.edu/faculty/farabee/biobk/
  BioBookINTEGUSYS.htmlLinks
• www.dictionary.com