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Integumentary Sstem
Chapter 6
17
Biology
Undergraduate 1
06/29/2010

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Term
Integumentary System
Definition

Skin and its accessory organs:

Hair, nails, and cutaneous glands

Term
Skin 
Definition
  • Most vulnerable organ
  • Exposed to radiation, trauma, infection, and injurious chemicals
  • receives more medical treatment than any other organ
Term
Dermatology
Definition
Scientific study and medical treatment of the Integumentary system
Term
Epidermis & Dermis
Definition
Layers that make up Skin and Subcutaneous Tissue
Term
Hypodermis
Definition
Connective Tissue layer below the Dermis
Term
Functions of the Skin
Definition
  • Resistance to trauma and infection
  • other barrier functions
  • Vitamin D Synthesis
  • Sensation
  • Thermoregulation
  • Nonverbal Communication
  • Transdermal Absorption
Term
Resistance to trauma and infection
Definition
  • Keratin
  • acid mantle
Term
Other barrier functions
Definition
  • Waterproofing
  • UV Radiation
  • Harmful Chemicals
Term
Vitamin D Synthesis
Definition
  • Skin First Step
  • Liver and kidneys complete process
Term

Sensation

 

Definition
Skin is our most extensive sense organ
Term
Thermoregulation
Definition
  • Thermoreceptors
  • vasoconstriction / vasodilation

 

Term
Nonverbal Communication
Definition
  • Acne
  • Birthmark
  • Scar
Term
Transdermal Absorption
Definition
Administration of certain drugs steadily through thin skin - adhesive patches
Term
Epidermis
Definition

Keratinized stratified squamous epithelium

 

  • Dead cells at the surface packed with tough protein - Keratin
  • Lacks blood vessels
  • depends onthe diffusion of nutrients from underlying connective tissue
  • sparse nerve endings for touch and pain

Term
Cells of the Epidermis
Definition
  • Stem Cells
  • Keratinocytes
  • Melanocytes
  • Tactile (merkel) cells (touch receptors)
  • Dendritic (langerhans) cells
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