The three lines of defense your body has against disease include all except...
A. physical and chemical defenses.
B. inflammation.
C. immune system.
D. scarring.
D. scarring.
True or False:
B cells and H cells are two important cells in the immune system that help fight infection.
False. There is no such cell as H cell in the immune system. The correct term is T cells, not H cells.
Antibodies are produced by
A. B cells.
B. T cells.
C. red blood cells.
D. lymph nodes.