- ACTIVATING COMPLEMENT: Antibody-antigen complexes that begins the pathway of the complement system.
- AGGLUTINATION: The action where cells clump together, this may be caused by antigens and antibodies reacting together or multiple sites on the antibody. This makes phagocytosis to occur more easily.
- ANTIGENS: Foreign substances that enter the body which trigger T and B cells.
- ANTIGEN PRESENTING CELLS: Cells that present antigen receptors on their membranes so other cells can recognise the cell as infected.
- BACTERIA: An unicellular micro-organism that lacks nucleus but has cell membrane.
- BONE MARROW: Part of the lymphatic system, produces T and B cells, site where B cells mature.
- CELL-MEDIATED: A process that occurs via cells.
- CHEMICAL PROTECTION: Where different types of chemicals protect the body, eg sweat.
- ENHANCING PHAGOCYTOSIS: An area of the antibody that acts as an attraction to phagocytes to a location near antigens.
- HOMOEOSTASIS: Where an organism regulates internal conditions regardless of external conditions.
- HUMORAL MEDIATED: Where antibodies are used to defeat antigens.
- IMMOBILIZING BACTERIA: Antigens on the cilia of bacteria react with antigens which causes the bacteria to stop spreading as they lose their motility.
- INNATE: Something a person is born with.
- LYMPHOCYTES: A white blood cell that has a single round nucleus associated with the lymphatic system.
- NATURAL FLORA: Micro-organisms that are present even in the state of normal health.
- NEUTRALIZING ANTIGEN: Where bacterial toxins are blocked by antibodies with antigens, also prevents viruses attaching to body cells.
- NON-PATHOGENIC: The ability to not cause disease
- NATURAL SECRETION: Secretion of a substance even when in perfect health
- NON-SELF: Where a cell does not have the features generally associated with normal body cells.
- NON-SPECIFIC: Where a process is general.
- MECHANICAL PROTECTION: Where the body mechanically protects the body, eg. intact skin.
- PATHOGEN: A micro-organism that causes disease
- SELF: A cell that is specific to a humans body.
- SPECIFIC: Where something is defined to a cell and that cell only.
- T CELL RECEPTORS: Receptors that are evident on only T cells.
- THYMUS: Located between the lungs, is the site where T cells mature.
- VIRUS: An organism that can only reproduce in a host, consists of nucleic acid.