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6 Cards in this Set
- Front
- Back
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FUNCTIONS OF THE INTEGUMENTARY SYSTEM |
• Acts as a mechanical barrier. • Protects the internal structures and organs from injuries caused by blows, cuts, harsh chemicals, sunlight, burns, and pathogenic microorganisms.• Participates in the immune response against invading microbes by housing specialized cells, called dendritic or Langerhans’ cells. When the skin is broken, the dendritic cells alert the immune system so that it can ward off infection.• Performs an excretory function.• Acts as a gland by synthesizing vitamin D when exposed to sunlight. • Performs a sensory role by housing the sensory receptors for touch, pressure, pain, and temperature. • Plays an important role in the regulation of body temperature. |
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integument or cutaneous membrane |
The skin |
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The skin has two distinct |
the outer, or surface, layer is the epidermis and the inner layer is the dermis. |
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The epidermis (ep-i-DER-mis) |
The epidermis (ep-i-DER-mis) is the thin outer layer of the skin and is composed of stratified squamous epithelium. |
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The stratum germinativum (jer-mi-nah-TIV-um) |
lies on top of the dermis and thus has access to a rich supply of blood. |
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The stratum corneum |
is the surface layer of the epidermis and is composed of about 30 layers of dead, flattened, keratinized cells. |
