Immune System Crossword

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Across
  1. 2. Line of defense that includes memory cells
  2. 3. one MHC molecules on all nucleated cells
  3. 5. The immunity you are born with
  4. 6. Type of immunity developed in response to antigen exposure
  5. 7. Needs to happen before a T cell can be activated/cell division to occur
  6. 9. Type of immunity produced by transfer of antibodies
Down
  1. 1. Line of defense including our skin and mucus membranes
  2. 3. two MHC molecules on antigen presenting cells
  3. 4. Line of defense containing NK cells, macrophages, and interferons
  4. 8. The immunity built over time