Lymphoid System Flashcards
The primary lymphoid organs are the major site of lymphocyte proliferation and differentiation and include the ____, _____, and ______ _______.
Thymus
Bone marrow
Fetal liver
Secondary lymphoid organs
Lymph nodes
Spleen
Tonsils, adenoids, peyer’s patches
Lymph vessels which conduct lymph fluid into the lymph node
Afferent lymphatics
Conduct lymph fluid out of the lymph nodes to the tissue
Efferent lymph nodes
Outermost region of a lymph node which contain spherical accumulations of B-lymphocytes.
Cortex
Spherical areas where b lymphs become B lymphoblasts after antigenic stimulation
Follicles
Area beneath the cortex that contains numerous T-lymphocytes
Paracortex
Produced from t-lymphocytes after Antigenic stimulation
T lymphoblasts
These structures are located in lymph nodes and participate in antigen recognition.
Antigen presenting cells
Lymphocytes enter lymph nodes through afferent lymphatics or through small blood vessels that supply blood to the lymph
Lymphocyte migration
Contains plasma cells and macrophages
Medulla
Located in sinuses where they filter out particulate antigens
Macrophages
Secrete antibody into the sinuses so it is carried out in the lymph exiting the lymph nodes
Plasma cells
Tissues and organs composed of cells involved in the immune response
Lymphoid system
