The Anatomy of the Integumentary System-Skin

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The Anatomy of the Integumentary System-Skin
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General Info..

• Skin has 2 layers
• Epidermis - outer layer
• Dermis inner layer
• Has Sweat glands that excrete sweat through the
  pores.
• Sweat is made up of urea, salts, and water.
• It is the bodys first line of defense!
• It is the largest organ of the body.

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Epidermis

• Contains thin outer layer of dead skin cells
  called the cuticle .
• This is the layer that you see everyday.
• When you complain about beingashy, it is
  because this layer of dead skin cells is very
  rough and raggedy.
• Most of the dust you see around your house is
  made up of dead skin cells!
• Under the cuticle is another layer of living
  epithelial cells that make up the rest of the
  epidermis.

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Dermis

• Thick layer under the epidermis
• Contains blood vessels
• Oil glands
• Sweat glands
• Hair follicles
• Fat tissue
• Nerves
• Connective tissue

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The skin also helps control body temperature-
Homeostasis!

• When you sweat, heat leaves the body through your
  pores.
• When the sweat hits the outer surface of the
  skin, it is cooled by the air.
• This lowers your body temperature.

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The Amazing Body- Skin
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Use the following vocabulary to label the
diagram hair shaft, oil (sebaceous)gland, fat
cells, erector pili muscle, blood vessels, nerve
endings, epidermis, dermis, cuticle, epithelial
cells, hair follicle, sweat gland, connective
tissue