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Sort the three lines of defence

Exercise and reference answers

Items
  1. Group
    Barrier
    Item
    Skin keratin
  2. Group
    Barrier
    Item
    Saliva lysozyme
  3. Group
    Barrier
    Item
    Stomach acid
  4. Group
    Innate
    Item
    Neutrophils
  5. Group
    Innate
    Item
    Complement
  6. Group
    Innate
    Item
    NK cells
  7. Group
    Adaptive
    Item
    Cytotoxic T cell
  8. Group
    Adaptive
    Item
    Plasma cells
  9. Group
    Adaptive
    Item
    Memory B cells
Groups
  1. Item
    Barrier
  2. Item
    Innate
  3. Item
    Adaptive
Instructions
Steer each falling defence into its column. Two of a kind merge into one.

Explanation

_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 21 "The Lymphatic and Immune System", section 21.2 Barrier Defenses and the Innate Immune Response_
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