16.1 Strategy of the Adaptive Immune Response (Figure 16.1)

Overview of Humoral Immunity

1. Humoral immunity is mediated by B cells; in response to extracellular antigens, these may be triggered to proliferate and then differentiate into plasma cells that function as antibody-producing factories.

Overview of Cellular Immunity

1. Effector T-cytotoxic cells are able to induce apoptosis in "self" cells that present abnormal proteins that signify danger.

2. Effector T-helper cells orchestrate the various responses of cellular and humoral immunity.

16.2 Anatomy of the Lymphoid System (Figure 16.2)

Lymphatic Vessels

1. Lymph, which may contain antigens that have entered tissues, flows in the lymphatic vessels to the lymph nodes.

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