The Immune System

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. The virus that causes acquired immune deficiency syndrome (3)
  2. 4. Any disease-producing agent (8)
  3. 7. An agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but (10)
  4. 10. Any substance that stimulates an immune response in the body (7)
  5. 12. A collection of lymphatic tissue in the throat behind the uvula (7)

Down

  1. 1. An illness that harms the body (plural) (8)
  2. 2. Either of two masses of lymphatic tissue one on each side of the oral pharynx (plural) (7)
  3. 5. A large dark-red oval organ on the left side of the body between the stomach and the diaphragm (6)
  4. 6. Of or relating to substances that are toxic to cells (9)
  5. 8. Immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order (7)
  6. 9. A person who contributes to the fulfillment of a need or furtherance of an effort or purpose (6)
  7. 11. The work of providing treatment for or attending to someone or something (plural) (4)