Effect of Vascularity on Skin Temperature Recovery

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Effect of Vascularity on Skin Temperature Recovery
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What you will learn today . . .

• Homeostasis refers to the bodys ability to
  maintain internal conditions within a certain
  range
• Many of the bodys chemical reactions have to
  take place at this temperature, regardless of the
  temperature outside the body
• The human skin is designed to detect changes in
  temperature and respond to them by its
  complicated structure
• The dermis of the skin either allows or prevents
  blood flow to the surface of the skin
• Skin with more blood vessels at its surface
  (vascularity) will return to the set point more
  quickly after a temperature change

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Homeostasis in Body Temperature

• What is normal body temperature?
• Many of the bodys chemical reactions have to
  take place at this temperature, regardless of the
  temperature outside the body
• The human skin is designed to detect changes in
  temperature and respond to them by its
  complicated structure

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Side View of the Skin
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Homeostasis in Body Temperature

• The dermis of the skin either allows or prevents
  blood flow to the surface of the skin
• Arteries constrict if it is cool to slow down
  blood flow
• Arteries dilate if it is hot to increase blood
  flow this produces a red, flushed appearance

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Skin Temperature

• What is normal skin temperature?
• This is the set point of the skin
• Skin with more blood vessels at its surface
  (vascularity) will return to the set point more
  quickly after a temperature change

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What you will do?

• You will compare the rate of recovery from cold
  in two different skin regions and draw
  conclusions about the vascularity of these areas.

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Make Your Hypothesis

• Rank the following body parts by their
  vascularity
• Thigh
• Upper Arm
• Palm of the Hand
• Kneecap
• Face
• Calf
• Shin

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Results