The Immune System
Name: ______________________ Date: ____________
Write the letter of the matching definition next to each term.
1. lymphocyte
A. The virus that causes acquired immune deficiency syndrome
2. HIV
B. Either of two masses of lymphatic tissue one on each side of the oral pharynx (plural)
3. antigen
C. The work of providing treatment for or attending to someone or something (plural)
4. diseases
D. Any disease-producing agent
5. pathogen
E. A large dark-red oval organ on the left side of the body between the stomach and the diaphragm
6. adenoid
F. A collection of lymphatic tissue in the throat behind the uvula
7. cytotoxic
G. An illness that harms the body (plural)
8. spleen
H. An agranulocytic leukocyte that normally makes up a quarter of the white blood cell count but
9. helper
I. Of or relating to substances that are toxic to cells
10. vaccine
J. Immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order
11. tonsils
K. Any substance that stimulates an immune response in the body
12. AIDS
L. A person who contributes to the fulfillment of a need or furtherance of an effort or purpose