which is not a secondary lymphoid organ?
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Secondary lymphoid organs are the lymphoid organs in which lymphocytes are activated to participate in the specific immune response. For example, Appendix, Tonsils, spleen, Peyer's patches of the small intestine, etc. Hence Thymus gland is not an example of the secondary lymphoid organ.
1287387
Non-Hodgkin lymphoma is divided into more than 30 types, classified based on the type of lymphocyte involved: B lymphocytes (B cells) or T lymphocytes (T cells). Non-Hodgkin lymphoma is further classified by other factors, including whether it is aggressive (fast-growing) or indolent (slow-growing).
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The majority of mature B cells outside of the GALT reside within lymphoid follicles of the spleen and lymph nodes, where they encounter and respond to T cell–dependent foreign antigens bound to follicular dendritic cells (DCs), proliferate, and either differentiate into plasma cells or enter GC reactions.
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The network of lymphatic vessels includes multiple interposed lymph nodes, small lentil- or bean-sized organs. They serve as filter stations for the lymph of a certain body region and contain specials cells of the immune system, the lymphocytes, which fight infections attacking the body.
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The cancer has spread to the inside of the spleen or liver, to lymph nodes other than the retroperitoneal lymph nodes, and/or to other organs or tissues outside the peritoneal cavity such as the lungs and bones (M1b).
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In addition to the specialized endocrine organs mentioned above, many other organs that are part of other body systems have secondary endocrine functions, including bone, kidneys, liver, heart and gonads. For example, the kidney secretes the endocrine hormone erythropoietin.
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Lymphatic System Structures. The major components of the lymphatic system include lymph, lymphatic vessels, and lymphatic organs that contain lymphoid tissues. Lymphatic vessels are structures that absorb fluid that diffuses from blood vessel capillaries into surrounding tissues.
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The lymphatic system consists of the lymphatic vessels (capillary plexus, precollecting and collecting lymph vessels including lymphatic ampullae and diverticulum and lymphatic trunks and ducts), organs (lymph nodes, spleen, thymus and tonsils), tissue (Peyer's patch), etc.
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The term "swollen glands" usually refers to enlarged lymph nodes. In fact, lymph nodes are not actually glands. They are small bundles of white blood cells that are present in multiple areas throughout our body.
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The red bone marrow is a key element of the lymphatic system, being one of the primary lymphoid organs that generate lymphocytes from immature hematopoietic progenitor cells. The bone marrow and thymus constitute the primary lymphoid tissues involved in the production and early selection of lymphocytes.
819376
Brain is not involved in elicitation of immune response. Lymph nodes are oval shaped organs of lymphatic system, distributed widely throughout our body and are garrisons of B,T and other immunity cells. The thymus is on specialised organ of immune system within which the T-cell nature.
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Lymph nodes near the kidneys are called regional lymph nodes. Lymph nodes in other parts of the body are called distant lymph nodes. NX: The regional lymph nodes cannot be evaluated.
546637
The lymphatic system primarily consists of lymphatic vessels, which are similar to the veins and capillaries of the circulatory system. The vessels are connected to lymph nodes, where the lymph is filtered. The tonsils, adenoids, spleen and thymus are all part of the lymphatic system.
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The histological structure of four different types of secondary lymphoid tissue; lymph nodes, tonsils, Mucosa associated lymphoid tissue and the spleen, and how their structure is adapted to their different functions. The involvement of the lymphoid tissues in some common medical conditions.
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The cancer in another part of the body is called metastatic, or secondary, cancer. Metastatic cancer has the same type of cancer cells as the primary cancer. For example, when colon cancer spreads to the liver, the cancer cells in the liver are colon cancer cells. It is metastatic colon cancer, not liver cancer.
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['white blood cells.', 'antibodies.', 'complement system.', 'lymphatic system.', 'spleen.', 'bone marrow.', 'thymus.']
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Naive B cells circulate in the lymph and secondary organs until they encounter antigen in the B-cell follicles. ... Most soluble protein antigens bear single epitopes that can still trigger an immune response specific for that epitope.