Department of Zoology
Southern Illinois University at Carbondale

ZOOL 409, Lecture Week 6

• Week 6 lab notes
• SYLLABUS (including links to all note pages)
• 409 Homepage (index of course resources)
• Dr. King's School of Medicine histology page
• Slide summary

Topics for Week 6 Lectures (lecture slides):

1. Monday's lecture shall provide an overview of skin.  Click here or on one of the links below for detailed notes.
   

   The skin is the largest organ of the body.  As the primary interface between ourselves and our environment, the skin serves several distinct functions.

   • protection
   • sensation
   • thermoregulation
   • communication.
   •  Skin is also self-repairing after injury.

   The microscopic anatomy of skin reflects this functional complexity, with each functional specialization implemented by particular features of cell and tissue structure.

   • LAYERS of skin
     • epidermis
     • dermis
   • APPEARANCE of skin
   • CELL TYPES
     • Epidermal cells -- keratinocytes, melanocytes, Langerhans cells, Merkel cells
     • Dermal cells -- see connective tissue cells
   • SPECIAL STRUCTURES
     • sweat glands
     • hair follicles, sebaceous glands
     • nails
     • innervation
     • vasculature
   • REGIONAL DIFFERENTIATION
   • FUNCTIONS of skin
     • Containment
     • Protection
   • Healing after injury
   • Sensation
   • Thermoregulation
   • Communication
   • BIOPSY -- Examine and interpret a skin biopsy specimen.
   
    

2. Wednesday's lecture shall provide an overview of process of inflammation.  Click here or on one of the links below for detailed notes.

   • OVERVIEW
   • CARDINAL SIGNS (the four "ORs", rubor, tumor, calor, dolor)
   • PHYSIOLOGY
     • Increased perfusion
     • Increased permeability
     • Emigration of leukocytes
     • Neural response
   • INFLAMMATORY (LEUKOCYTIC) INFILTRATE
     • Neutrophils
     • Lymphocytes and plasma cells
     • Monocytes
   • EXAMPLES (images of inflammation)
   • More from WebPath

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Department of Zoology e-mail: zoology@zoology.siu.edu
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