Question

Which of the following groups is included in the secondary lymphatic organs?

Hint:

Secondary lymphatic organs are where immune cells are activated, and include the tonsils, spleen, and MALT like Peyer's patches in the small intestine.

Answer 1

Secondary lymphatic organs are involved in the activation and response of the immune system. These include structures like the tonsils, spleen, lymph nodes, and mucosal-associated lymphoid tissues (MALT). Segments of the duodenum and pairs of lymphatic tissues in the small intestine (such as Peyer's patches) are examples of MALT, which function as secondary lymphatic organs.