Biology 251: Lecture 5Fall 1996

Major Life Systems I

  1. Cuticle
    1. Comparison to mammalian skin
    2. Components
      1. Epicuticle
      2. Procuticle
        1. Components
          1. Exocuticle
          2. Endocuticle
        2. Composition
          1. Carbohydrates - chitin
          2. Proteins
        3. Sclerites
        4. Membranes
    3. Sclerotization
    4. Tanning

  2. Epidermis

  3. Basement membrane

  4. Respiration
    1. Major structures
      1. Trachea (-e)
      2. Tracheole
      3. Spiracle
      4. Air sac
    2. Other important structures
      1. Spiracle sphincter valve
      2. Taenidia (-e)
    3. Efficiency
    4. Aquatic insects
      1. Problem
      2. Solutions
        1. Oily spiracle hairs
        2. Frequent visits to the surface
        3. Physical gills
        4. Plastron
        5. Closed tracheal system


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