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her Thoracic duct or right lymphatic duct Thoracic (left lymphatic) duct Left subclavian vein Right lymphatic duct Right subclavian vein Cysterna Chyli Fig largest Lymphocytes Agranulocytes large nuclei and small amount of cytoplasm Function in identification and inactivation/destruction of pathogens Types of Lymphocytes 1. T Cells cellular immunity specific for previously identified pathogens T Helper, T Killer, T Suppressor, and memory cells 2. B Cells humoral immunity plasma cells produce antibodies specific to the antigen or pathogen。 memory cells 3. NK cells nonspecific, provide immunological surveillance Bone Marrow: Lymphopoiesis Lymphocytes are later also produced in thymus, spleen and tonsils Fig 1 2 2 ? . loaded with Lymphocytes ? Lymphoid nodules are