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Immune System - Coggle Diagram

- - - - Resistant to diseases that affect other species
      - Bases on: Chemical environments, body temperature, presence or absence of receptors
    - - prevent the entry of pathogens by providing physical separation
      - unbroken skin and mucous membranes of body; hair muscus sweat;
      - represents first line of defense
    - - tissue response to injury/infection
      - purpose is to stop the spread of pathogens
      - consists of redness, swelling and heat
      - dilation of blood vessels; attraction of white blood cells to are, blood clotting, increased capillary permeability
    - - kill many pathogens
      - acidic environment is lethal to pathogens
      - Enzymes (lysozyme, pepsin) destroy pathogens
      - Interferon's slow tumor growth
    - - group of lymphocytes besides B and T cells
      - defend body against disease by secreting perforins to break apart cell membranes of pathogens
      - enhance inflammation
    - - engulfment of particles and debris
      - neurophils (engulf small particles) and monocytes (attack large ones)
      - attracted by chemiclas of injury
    - - when body temperature is set at high point
      - provides hostile environment for pathogens
      - high temperatures cause liver and spleen to take up iron
- - - - Helper T cells- stimulate B cells to produce antibodies
      - Cytotoxic T cells - monitors cells, eliminating cancer and virus infected cells
      - Memory T cells- quick response to any future exposure to antigen;divide to produce cytotoxic T cells