Lymphatic System Flashcards
organs of the lymphatic system
lymph nodes, tonsils, thymus, spleen, MALT
functions of the lymphatic system
distribute lymphocytes and return excess fluid to blood stream
5 tonsils
1 pharyngeal, 2 palatine, 2 lingual
lymphatic capillaries
closed at one end, larger lumen, thinner walls, irregular outline
thoracic duct
carries lymph from tissues inferior to diaphragm and left upper body; empties into left subclavian vein
right lymphatic duct
carries lymph from upper right side of body ONLY; empties into right subclavian vein
two types of immunity
innate and adaptive
innate immunity
aquired from genetics; present at birth
adaptive immunity
aquired from being exposed to antigen or recieving antibodies from another source; active and passive
active immunity (adaptive)
develops from exposure to antigen
naturally aquired active immuniity
develops after exposure to antigen in environment
artificially aquired active immunity
develops after injection of an antigen to prevent disease (vaccination)
passive immunity (adaptive)
produced by transfer of antibodies from another source
naturally aquired passive immunity
transfer of antibodies through placenta or breast milk
artificially aquired passive immunity
injection of antibodies
cell mediated immunity
provided by t cells; defend against pathogents inside cells
antibody mediated immunity
provided by b cells; defend against pathogens in body fluids
lymphadenopathy
chronic or excessive enlargement of lymoh nodes
immunoglobulins
antibodies
IgM
anti-a and anti-b antibodies responsible for agglutination of incompatible blood types
IgA
found in liquids; attack pathogens before they enter internal tissues
IgD
on surface of b cell; role in b cell sensitization
IgG
largest class (80%); can cross placents (anti-Rh antibodies)
IgE
attaches to basophils and mast cells; important in allergic response
