IMMUNOLOGY

Detailed explanation-1: -Lymph Nodes The lymph node is composed of sinuses that allow travel of lymph, the cortex and paracortex composed of T and B lymphocytes, and the medulla consisting of plasma cells and macrophages (Figure 7).

Detailed explanation-2: -The inner cortex contains mostly T-cells. The deep cortical, and medullary cords contain B-cells and plasma cells. Plasma cells live for 3 days, and make IgG type antibodies. This diagram of a lymph node shows the pathways that lymphocytes can take, in and out of the lymph node.