Immune System

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. Sound of any kind (5)
  2. 6. To become less tense, rest, or take one's ease (5)
  3. 8. Blood cells that engulf and digest bacteria and fungi (plural) (10)
  4. 12. To bring or combine together or with something else (6)
  5. 13. A bodily defense reaction that recognizes an invading substance and produces antibodies specific (14)

Down

  1. 1. Resembling ___ or ___ tissues (8)
  2. 3. A ___ that protects the body from foreign substances and pathogenic organisms by producing (12)
  3. 4. A ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing (6)
  4. 5. A consoling aspect of a difficult situation (10)
  5. 7. A facial expression characteristic of a person ___ (5)
  6. 9. The process of using your mind to consider something carefully (8)
  7. 10. A natural and periodic state of rest during which consciousness of the world is suspended (5)
  8. 11. Sounds put together in songs and tunes (5)