Tonsil Thymus SALT (skin-associated lymphoid tissue) -Spleen -MALT (mucosa- associated lymphoid tissue), including Peyer's patches Bone marrow Lymph node Follicles (where naive B cells gather) Lymphatic vessels Paracortex (where naive T'cells gather) Artery -Vein Efferent (outgoing) lymphatic vessel Afferent (incoming) lymphatic vessels FIGURE 15.3 Anatomy of the Lymphatic System Lymph flows through a system of lymphatic vessels, passing through lymph nodes and lymphoid tissues.

What kind of lymph vessel first picks up lymph?

Give the function of Lymphatic system?

What is the mechanism for lymphocyte maturation so that lymphocytes will respond to non-self cells and not respond to self cells? What happens to the lymphocytes that do respond to self cells?