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The Appendix Is a Narrow Tube Which Traps Microorganisms from the Digestive

Question 81

Multiple Choice

The appendix is a narrow tube which traps microorganisms from the digestive tract, and these microorganisms enter its wall and activate memory lymphocytes for long-term immunity. Another immune organ that traps microorganisms is the


A) thymus.
B) bone marrow.
C) palatine tonsil.
D) the spleen.

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