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Chapter 9: Anatomy and Physiology (Lymphatic)

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acquired immunity
Immunity that is a result of the body developing the ability to defend itself against a specific agent, as a result of having had the disease or from having received an immunization against a disease.
adenoids
Masses of lymphatic tissue located near the opening of the nasal cavity into the pharynx; also called the pharyngeal tonsils.
edema
The accumulation of fluid within the tissue spaces.
hypersensitivity
An abnormal condition charaterized by an excessive reaction to a particular stimulus.
immune reaction (immune response)
A defense function of the body that produces antibodies to destroy invading antigens and malignancies.
immunity
The state of being resistant to or protected from a disease. The individaul is said to be "immune".
immunization
The process of creating immunity to a specific disease.
immunologist
The health specialist whose training and experience is concentrated in immunology.
immunology
The study of the reaction of tissues of the immune system of the body to antigenic stimulation.
immunotherapy
A special treatment of allergic responses that administers increasingly large doses of the offending allergens to gradually develop immunity.
local reaction
A reaction to treatment that occurs at the site it was administered.
lymph
Interstitial fluid picked up by the lymphatic capillaries and eventually returned to the blood. Once the intersititial fluid enters the lymphatic vessels, it is known as lymph.
lymphadenopathy
Any disorder of the lymph nodes or lymph vessels, characterized by localized or generalized enlargement.
lymphocyte
Small, agranulcytic leukocytes originating from fetal stem cells and developing in the bone marrow.
macrophage
Any phagocytic cell involved in the defense against infection and in the desposal of the products of the breakdown of cells. Macrophages are found in the lymph nodes, liver, spleen, lungs, brain, and spinal cord.
natural immunity
Immunity with which we are born; also called genetic immunity.
pathogens
Disease-producing microorganisms.
phagocytosis
The process of a cell engulfing and destroying bacteria.
resistance
The body's ability to counteract the effects of pathogens and other harmful agents.
susceptible
A state fo having a lack of resistance to pathogens and other harmful agents. For example, the individual is said to be "susceptible".
T cells
Cells important to the immune response, They mature in the thymus. Upon maturation, the T cells enter the blood and circulate thoughout the body, providing defense against disease by attacking foreign and/or abnormal cells.
tonsils
Masses of lymphatic tissue located in a protective ring, just under the mucous membrane, surrounding the mouth and back of the throat.