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Quiz 9 Vocabulary Terms
Ms. Wright
7
Science
7th Grade
10/18/2007

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Term
immune system
Definition
The cells and tissues that recognize and attack foreign substances in the body.
Term
immunity
Definition
The ability to resist an infectious disease.
Term
macrophage
Definition
An immune system cell that engulfs pathogens and other materials.
Term

T cell

Definition
An immune system cell that coordinates the immune system and attacks many infected cells.
Term
B cell
Definition
A white blood cell that makes antibodies.
Term

antibody

Definition
A protein made by B cells that bind to a specific antigen.
Term
memory B cell
Definition
AB-cell that responds to an antigen more strongly when the body is reinfected with anantigen than it does its first encounter with the antigen.
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