LYMPHOID

LYMPHOID

1. CELLS

   • Lymphocytes
     • T: manage the immune response, attack and destroy infected cells.
     • B: producing plasma cells(daughter cells) that secrete antibodies into the blood
   • Macropages:
     • phagocytizing foreign substances and by helping to activate T cells
   • Dendritic cells
     • capture antigens and bring them back to the lymph nodes.
   • Reticular cells
     • produce the reticular fiber stroma

2. TISSUE

   • reticular connective tissue
     • Diffuse lymphoid tissue
       • a loose arrangement of lymphoid cells and some reticular fibers
     • Lymphoid follicles (lymphoid nodules)
       • are solid, spherical bodies consisting of tightly packed lymphoid cells and reticular fibers.

3. LYMPH NODES

   • Filtration
   • Immune system activation.
   • less than 2.5 cm
   • bean shaped