The Immune System

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. The opening through which food is taken in and vocalizations emerge (5)
  2. 4. The condition in which an organism can resist disease (8)
  3. 6. Hypersensitivity reaction to a particular ___ (7)
  4. 7. Any of a large variety of proteins normally present in the body or produced in response to (plural) (10)
  5. 10. Any disease-producing agent (8)
  6. 11. A large dark-red oval organ on the left side of the body between the stomach and the diaphragm (6)
  7. 12. The organ of smell and entrance to the respiratory tract (4)

Down

  1. 1. Any substance that stimulates an immune response in the body (plural) (8)
  2. 3. The virus that causes acquired immune deficiency syndrome (3)
  3. 5. Tiny single-celled living things, some of which cause illness (8)
  4. 7. The abbreviation for acquired immunodeficiency syndrome, an advanced stage of HIV infection. (4)
  5. 8. A lymphocyte derived from bone marrow that provides humoral immunity (plural) (6)
  6. 9. Either of two masses of lymphatic tissue one on each side of the oral pharynx (plural) (7)