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| Mass of lymphatic tissue in the nasopharynx. |
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| Produced by B cells to destroy antigens. |
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| Substance that the body recognizes as foreign; evokes an immune response. Most antigens are proteins or protein fragments found on the surface of bacteria, viruses, or organ transplant tissue cells. |
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| Lymph nodes in the armpit. |
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| Lymphocyte that matures into a plasma cell to secrete antibodies. The B refers to the bursa of Fabricius, an organ in birds in which B cell differentiation and growth were first noted to occur. |
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| Lymph nodes in the neck region. |
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| Lymphocyte that directly kills antigens; called (CDB+) T cell. |
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| Lymphocyte that aids B cells and stimulates T cells. Also called (CD4+) T cell. |
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| T cells, respond to antigens and destroy them, a type of adaptive immunity. |
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| B cells produce antibodies after exposure to specific antigens; type of adaptive immunity. |
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| Body's ability to resist foreign organisms and toxins that damage tissues and organs. Includes natural immunity and adaptive immunity. |
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| Antibodies such as IgA, IgE, IgG, IgM, and IgD; secreted by plasma cells in response to the presence of an antigen. |
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| Use of immune cells, antibodies, or vaccines to treat or prevent disease. |
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| Lymph nodes in the groin region |
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| Proteins secreted by T cells and other cells to aid and regulate the immune response. |
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| Fluid in the spaces between cells. This fluid becomes lymph when it enters lymph capillaries. |
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| Thin, watery fluid found within lymphatic vessels and collected from tissues throughout the body. |
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| Tiniest lymphatic vessels |
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| Lymph nodes, spleen, and thymus gland. |
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| Collection of stationary solid lymphatic tissue along lymph vessels; contains cells that fight infection. |
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| Large phagocyte found in lymph nodes and other tissues of the body. |
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| Lymph node in the area between the lungs in the thoracic cavity. |
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| Lymph nodes in the mesentery. |
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| Protection that an individual is born with to fight infection such as neutrophils, monocytes, macrophages, and NK cells. |
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| Lymph nodes near the aorta in the lumbar area of the body. |
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| Lymphocyte that secretes antibodies. It matures from B lymphocytes. |
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| Lymphatic vessel in the chest that drains lymph from the upper right part of the body. |
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| Lymphocyte that inhibits the activity of B and T cells. |
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| Lymphocyte that acts directly in antigens to destroy them or produce chemicals such as interferons and interleukins that are toxic to antigens. |
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| Large lymphatic vessel that drains lymph from the lower and left side of the body. |
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| Lymphoid organ in the mediastinum that conditions T cells to react to foreign cells and aids in the immune response. |
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| Masses of the lymphatic tissue in the back of the oropharynx. |
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Definition
| Exposure of an individual to a foreign protein that provokes an immune response. |
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| Weakened or killed microorganisms, toxins, or other proteins given to induce immunity to infection or disease. |
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