| A | B |
| Acquired Immunity | Either active or passive immunity. |
| Active Immunity | An immunity that appears after exposure. |
| Agglutination | Formation of large clumps of red blood cells. |
| Allergens | Antigens that trigger allergic response. |
| Allergies | Inappropriate or excessive immune responses to antigens. |
| Antibodies | Soluble proteins that attach to a specific chemical target. |
| Antibody Mediated Immunity | The body’s regulation of B-cells to respond to pathogens. |
| Antigen Binding Sites | Contain free tips that are the exact correct shape to fit into a specific pathogen. |
| Antigen-Antibody Complex | When an antibody binds with the proper antigen of the exposed surface. |
| Antigens | Pathogens which antibodies will identify and attack. |
| Autoimmune Disorders | When the body response to mistaken targets of normal body cells. |
| B-Cells | Bone marrow driven cells which can be differentiated. |
| Cell Mediated Immunity | The body’s regulation of T-cells to respond to pathogens. |
| Chemotaxis | Movement in response to different chemical messages. |
| Colony Stimulating Factors (CSFs) | Produce a wide variety of cells for immunological responses. |
| Complement System | The 11 special proteins in plasma that support the actions of antibodies. |
| Cytokines | Chemical messengers released by tissue cells to coordinate local activities. |
| Cytotoxic T Cells | The cells responsible for cell-mediated immunity. |
| Fever | Having a body temperature above 37.2ºC |
| Helper Cells | Activated by exposure to antigens bound to Class II MHC proteins. |
| Immune Response | The main purpose, which is to destroy or inactivate pathogens. |
| Immunity | Is the ability to resist infection and disease through the activation of specific defenses. |
| Immunodeficiency Disease | Either the immune system fails to develop normally or the immune response is blocked. |
| Immunoglobulin | Another name for Antibodies. |
| Immunoglobulin | Different classes of antibodies |
| Immunological Surveillance | The constant monitoring of normal tissues by the NK cells. |
| Inflammation | Localized tissues responding to sensations by swelling, redness, heat, and pain. |
| Innate Immunity | Genetically determined immunity. |
| Interferon | Small proteins released by activated lymphocytes which attack invaders. |
| Interleukins (IL) | May be the most diverse and important chemical messenger in the immune system. |
| Lymph Nodes | Small, oval lymphoid organs covered by a fibrous capsule that act like a filter. |
| Lymph | Fluid that flows through the lymphatic vessels. |
| Lymphatic Capillaries | Blind pockets that begin the movement of lymph. |
| Lymphatic System | System that fights off infection and keeps us alive. |
| Lymphatic Vessels | Connection of vessels from the peripheral tissues to the venous system. |
| Lymphoid Nodules | Masses of lymphoid tissue that are not surround by a fibrous capsule. |
| Lymphoid Organs | Organs connected to the lymphatic vessels. |
| Lymphopoiesis | The production of lymphocytes through stem cells. |
| Macrophages | Large active phygocytic cells derived from the monocytes of the blood. |
| Memory B Cells | Provide the body with reserve antibody with the correct antibody. |
| Memory Cells | Cells produced during an infection that wait for the invader to return. |
| Memory T Cells | Reserve cells used in fighting pathogens with the correct antibody. |
| Memory | The immunes system ability to remember antigens it has encountered. |
| Microphages | Able to leave the blood stream and enter peripheral tissues. |
| Monocytes - Macrophage System | Special macrophages able to combat one single target. |
| Necrosis | Tissue degeneration that occurs after cells have been injured or destroyed. |
| Neutralization | When antibodies make it so a pathogen can not attach to another cell. |
| NK Cells | Lymphocytes that will attack foreign cells, normal cells infected with viruses, and cancer cells that appear in normal tissues. |
| Nonself | Antigens which are not the result of B and T Cells. |
| Nonspecific Defenses | Do not tell the difference between one threat or another. |
| Nonspecific Resistance | The ability of the body to protect itself from any invaders. |
| Passive Immunity | An immunity as a result of the transfer of antibodies from one individual to another. |
| Pathogens | Microorganisms responsible for causing human diseases. |
| Phagocytes | First line defenders against microorganisms |
| Phygocytic Regulators | Help to adjust the specific and nonspecific defenses of the phagocytes. |
| Plasma Cells | Cells responsible for the production and secretion of antibodies. |
| Precipitation | When toxins are too large to stay in solution they will settle out. |
| Primary Response | The initial response to an antigen exposure. |
| Pulp | The cellular components of the spleen either blood or lymph. |
| Pus | Debris or dead cells that have accumulated at the injury site. |
| Pyrogen | Messengers in the blood stream that reset the thermostat in the hypothalamus. |
| Regulatory T Cells | Group of both helper and suppressor T cells. |
| Right Lymphatic Duct | Collects lymph from the right side of the body. |
| Second Response | A second appearance of an antigen with a longer more prolonged and extensive attack. |
| Self | Antigens which are the result of the B and T Cells. |
| Severe Combined Immunodefiency Disease | Fail to develop either cellular or antibody mediates immunity. |
| Specific Defense | Look and protect the body from one kind of threat. |
| Specific Resistance | The body’s special protection for invaders. |
| Specificity | When an antigen released and is targeting only one particular antigen. |
| Spleen | Organ that contains the largest collection of lymphatic tissue in the body. |
| Suppressor T Cells | Depress the responses of other T cells and B cells with suppression factor. |
| T-Cells | Cells which directly attach foreign cells or body cell infected by viruses. |
| Thoracic Duct | Collects lymph form the lower abdomen, pelvis, and lower limbs. |
| Thymus | The organ where T-cells are produced and maturation takes place. |
| Tolerance | When the immune system does not have to respond to a particular antigen. |
| Tonsils | Lymphoid Nodules in the walls of the pharynx. |
| Tumor Necrosis Factor (TNF’s) | Slow tumor growth and the killing of sensitive tumor cells. |
| Vaccine | Preparation of antigens derived for a specific pathogen. |
| Versatility | Production of many lymphocytes in response to any possible threat. |