| A | B |
|---|
| Edema | Fluid that impairs the ability of tissue cells to make xchanges with the interstitial fluid and ultimately the blood. |
| Lymph | Excess tissue fluid. |
| Lymph Nodes | Protect the body by removing foreing material such as bacteria and tumor cells fromt he lymphatic stream and by producing lymphocytes that function in the immune response. |
| Macrophages | Engulf and destroy bacteria, viruses, and other forign substnacesin the lymph before it is returned to the blood. |
| Lymphocytes | A type of white blood cell that respond to foreign substances in the lymphatic stream. |
| Spleen | A soft, blood rich organ that filters blood. |
| Thymus Gland | A lymphoid mass found low in the throat overlying the heart. |
| Tonsils | Small masses of lymhpoid tissue that ring the pharynx, where they are found in the mucosa. |
| Peyer's Patches | Act like tonsils but are found in the wall of the small intestine. |
| Innate Defense System | Responds immediately to protect the body from all foreign substances. |
| Adaptive Defense System | Mounts attacks against particular foreign substances. |
| Immunity | Highly specific reistsnace to disease. |
| Pathogens | Disease causing microorganisms. |
| Lysozyme | An enzyme that destroys bacteria. |
| Phagocytes | Engulfs foreign particles. |
| Natural Killer Cells | Cells that lyse and kill cancer cells virus infected body cells. |
| Inflammatory Response | Nonspecific response that is triggered whenever body tissues are injured. |
| Complement | Refers to a group of 20 plasma proteins that circulate in the blood in an inactive state. |
| Interferons | These molecules diffuse to nearby cells and bind to their membrance receptors. This intereferes with the viruses ability to multiply. |
| Pyrogens | Chemicals secreted form white blood cells and macrophages exposed to foreign cells. |
| Humoral Immunity | Provided by anitbodies present in the body's fluids. |
| Cell Mediated Immunity | When lymphocytes themselves defend the body. |
| Antigen | Any substance capable of mobilizing our immun system and provoking an immune response. |
| B Lymphocytes | Produce antibodies and oversee humorla immunity. |
| T Lymphocytes | The cell responsible for attacking foreign substances during cell mediated immunity. |
| Plasma Cells | Type of white blood cells that produces and secretes antibodies. |
| Memory Cells | B cells that do not become plasma cells and are capable of responding the sane anitgen at later meetings. |
| Active Immunity | When B cells encounter antigens and produce antibodies against them. |
| Vaccines | Artificial, small doses of a virus so that are body recognizes the real thing at later times. |
| Passive Immunity | Immunity acquired by the transfer of anitbodies from another individual. |
| Monoclonal Anitbodies | Descendants of a single cell and are pure anitbody preperations that exhibit specificity for one and only one antigen. |
| Antibodies | Soluble proteins that are secreted by activated B cells or by their plasma cell offspring in response to an anitgen. |
| Cytotoxic T Cells | Cells that are specialized in killing virus infected, cancer, or foreign graft cells. |
| Helper T Cells | Are T cells that act as directors or managers of the immune system. |
| Regulatory T Cells | Release chemicals that suppress the activity of both T and B cells. |
