Chapter 6 - Integumentary system

• Integumentary system is made up of:

  • skin
  • accessory structures
  • organs
• Skin

  main tissues of the skin:

  • epithelial
  • connective

  layers of the skin:

  • epidermis
  • outer later which is composed of stratified squamous epithelium
  • dermis
  • inner layer (thicker)
  • composed of connective tissue (collagen and elastic fibres), smooth muscle tissue, nervous tissue and blood

  Basement membranes separate both the epidermis and dermis

  A) golgi apparatus

  B) cell

  C) basement

  D) epidermis

  E) dermis

  
• Accessory structures - Nails

  • protective coverings
  • consist of nail plate that covers the nail bed
  • lunula is the most active growing region

  
• Accessory structures - Nails

  • protective coverings
  • consist of nail plate that covers the nail bed
  • lunula is the most active growing region (epithelial cells of nail matrix divide)

  A) cuticle

  B) free edge

  C) nail plate

  D) nail bed

  E) lunula

  F) nail matrix

  G) cuticle

  
• Accessory structures - hair follicles

  • hair develops from hair follicle
  • hair bulge can be found near the bottom of the hair follicle
  • deepest portion of the hair root is the hair bulb
  • arrector pili muscle - smooth muscle cells that attach to each hair follicle

  A) hair shaft

  B) pore

  C) hair root

  D) hair bulge

  E) hair follicle

  F) follicle

  G) root

  H) matrix

  I) papilla

  J) bulb

  
• Accessory structures - glands

  • endocrine
  • secrete substances into interstitial fluid and bloodstream
  • examples being hormones
  • exocrine
  • secrete substances into ducts and onto the surface
  • examples being sweat, saliva, milk, mucus

  A) endocrine

  B) exocrine

  C) endocrine

  D) exocrine