The lymph nodes add in fighting infection from invading pathogens by:
Question 2 options:
producing and storing white cells,
circulating and diluting it,
providing a physical barrier to slow its invasiveness
The answers are producing and storing white cells and providing a physical barrier to slow its invasiveness. Immune cells are stored in lymph nodes and reproduce there, when activated. Lymph nodes have a reticular structure, which traps pathogens flowing with lymph. It prevents from dissemination of the pathogen in human body.