(a) What are the three main functions of our immunological defence ? [4] (b) Name any two secondary lymphoid tissues.
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(a) What are the three main functions of our immunological defence ? [4] (b) Name tissues.
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a The Immune System has 3 Lines of Defense Against Foreign Pathogens:
Physical and Chemical Barriers (Innate Immunity)
Nonspecific Resistance (Innate Immunity)
Specific Resistance (Acquired Immunity)
b Secondary lymphoid organs (SLOs) include lymph nodes (LNs), spleen, Peyer's patches (PPs) and mucosal tissues- the nasal associated lymphoid tissue (NALT), adenoids, and tonsils.
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