Lymph nodes and spleen play what roles in immunity?

Lymph nodes and spleen play what roles in immunity?

• A. Lymph nodes filter lymph and mount immune responses; the spleen filters blood, removes old red blood cells, stores platelets, and participates in immune responses.
• B. Lymph nodes filter blood; the spleen filters lymph.
• C. Both organs filter plasma and do not participate in immune responses.
• D. Lymph nodes store platelets; spleen filters bile.

Answer: (A)