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45 Cards in this Set

  • Front
  • Back
immune system
the body's defense system against disease
specialized fluid formed in the tissue spaces that returns excess fluid and protien molecules to the blood
lymphatic vessels
vessel that carry lymph to its eventual return to the circulatory system
interstitial fliud (IF)
fluid located in the microscopic spaces between the cells
lymphatic duct
terminal vessel into which lymphatic vessels empty lymph; the duct then empties into the circlatory system
thoracic duct
largest lymphatic vessel in the body
cisterna chyli
an enlarged pouch on the thoracic duct that serves as a storage area for lymph moving toward its point of entry into the venous system
a lymphatic vessel located in each villus of the intestines; serves to absorb fat materials from the chyme passing through the small intestine
lymph nodes
performs biological filtration of lymph on its way to the circulatory system
to carry toward
to carry away
endrocrine gland located in the mediastrinum; vital part of the body's immune system
T cells
cells that are critical to the function of the immune system; produce cell-mediated immunity
hormone produced by the thymus that is vital to the development and functioning of the body's immune system
masses of lymphoid tissue; protect against; 3 types
palatine tonsils
located on each side of the throat
pharyngeal tonsils
(adenoids) near the posterior opening of the nasal cavity
lingual tonsils
near the base of the tongue
inherited immunity or
inborn immuntiy
immunity to disease that is inherited
inflammatory response
nonspecific immune process produced in response to injury and resulting in redness, pain, heat, and swelling and promoting movement of WBC's to the affected area
humoral or
antibody-mediated immunity
immunity that is produced when antibodies make antigens unable to harm the body
substance produced by the body that destroys or inactives a specific substance(antigen) that has entered the body
any of several inactive protien enzymes normally present in blood, which when activated kill foreign cells by dissolving them
combining sites
antigen-binding sites; antigen receptor regions on an antibody molecule; shape of each combining site is complementary to shape of specific antigen
substance that, when introduced into the body, causes formation of antibodies against it
antibodies causing antigens to clump or stick together
complement cascade
rapid fire series of chemical reastions involving protiens called complements triggered by certian antibody-antigen reactions and resulting in the formation of tiny protien rings that create holes in a foreign cell and thus cause its destruction
complement-binding sites
locations on an antibody molecule that become avaible after exposure to an antigen and that bind to complement protiens in the blood plasma to trigger a complement cascade that harms the antigen-containing cell
phagocytic cells in the immune system
kupffer cells
macrophage found in spaces between liver cells
dust cells
macrophages that ingest particulate matter in the small air sacs of the lungs
B lymphocytes or
B cells
a lymphocyte; activated B cells develop into plasm cells, which secrete antibodies into the blood
stem cells
cells capable of dividing to produce new cell types
memory cells
cells that remain in reserve in the lymph nodes until their ability to secrete antibodies is needed
plasma cell
cells that secrete copios amounts of antibody into the blood
cell-mediated immunity
resistance to disease organisms resulting from the actions of cells; cheifly sensitized T cells
hypersensitivity of the immune system to relatively harmless environmental antigens
harmless environmental antigen that stimulates an allergic reaction in a sensitized person
contact dermatitis
a local skin inflammation lasting a few hours or days after being exposed to an antigen
process in which a person's immune system attacks the person's own body tissue- underlying cause of several diseases
immune response to antigens of another human, as in transplanted (grafted) tissues; in some cases it is called rejection syndrome
human lymphocyte antigens (HLAs)
type of self-antigen that the immune system uses to distinguish one's own tissue from that of a foreign entity
immunosuppressive drugs
compounds that suppress, or reduce, the capacity of the immune system; such drugs are sometimes used to prevent rejection of transplanted tissue
immune deficiency
general term for complete or relative failure of the immune system to defend the internal environment of the body
severe combined immune deficiency (SCID)
nearly complete failure of the lymphocytes to develop properly, in turn causing failure of the immune system's defense of the body; very rare congenital immune disorder