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Lymphatic & Immune
Chapter 16 definitions
| Term | Definition |
|---|---|
| Lymphatic nodules | Masses of lymphatic tissue |
| Pharyngeal tonsil | Adenoids; sits on the wall of the pharynx, just behind the nasal cavity |
| Palantine tonsils | Lie in the posterior of the oral cavity |
| Lingual tonsils | Concentrated in patches on each side of the base of the tongue |
| Spleen | The body's largest lymphatic organ; surrounded by a fibrous capsule; contains red pulp and white pulp |
| Lysozyme | An enzyme found in mucus, tears, and saliva which destroys bacteria |
| Chemotaxis | The movement of WBCs to an area of inflammation in response to the release of chemicals from the injured cells |
| Interferon | Protein released from virus-infected cells that helps protect nearby cells from invasion |
| Anaphylaxis | Severe, immediate hypersensitivity reaction affecting the entire body |
| Cellular immunity | Immune response that targets foreign cells or host cells that have become infected with a pathogen |
| Complement | A group of proteins in blood that, through a cascade of chemical reactions, participate in nonspecific immunity |
| Humoral immunity | Immune response that uses antibodies to target pathogens outside the host cells |
| Immunoglobulins | Antibodies |
| Macrophage | Important phagocyte that remains fixed in strategic areas |
| Natural killer (NK) cells | Unique group of lymphocytes that continually roam the body seeking out pathogens or diseased cells |
| Neutrophils | Phagocytes that accumulate rapidly at sites of acute injury |
| Phagocytosis | Process by which phagocytes engulf and destroy microorganisms |
| Pyrexia | Fever |
| Thymus gland | Lymphoid organ where T cells mature; located in the mediastinal cavity |
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cbooher16
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