Lymphatic System Flashcards
Disease-fighting cells
lymphocytes
extra body fluid that drains from cells and tissues
lymph/ lymphatic fluid
4 lymphatic organs
To LN S Th
Tonsils
Lymph nodes
Spleen
Thymus
Function of tonsils
protects nasal and oral cavities by killing germs and preventing them from entering the mouth
Function of lymph nodes
-removes microbes by macrophages
-filters lymph
Function of spleen (blood reservoir)
Filters blood by
-detecting and responding to foreign substance
-destroys old RBC
Function of thymus gland
Produces lymphocytes
lymphocytes produces antibodies, aids in immunity
2 types of of immunity
innate and adaptive
under innate, what are 3 components
physical barriers
chemical mediators
cells of the immune system
Explain physical barriers (innate)
- first line of defense
- skin and mucous serves as barriers against PATHOGENS AND TOXINS
urine, saliva, tears washes away toxins and pathogens to prevent infection
4 examples of chemical mediators
LMHI and function
Lysozyme- found in tears/saliva. kills bacteria
mucous membrane- barrier against microbes
histamine- induce inflammation causing vasodilation
interferons- produce antiviral proteins. protection against infection
6 under cells of the immune system (innate)
NEBMMNk
NEUTROPHILS- phagocytize microorganism. fist to respond but die quickly
EOSINOPHILS- destroy parasites, reduce inflammation
BASOPHILS- produce histamine
MACROPHAGES- enter tissues & protect lymph in lymph nodes and blood in spleen/liver
MAST CELLS- release leukotrienes that promote inflammation
NATURAL KILLER CELLS- detect classes of cells such as tumor cells that cannot eb detected by other immune cells
-chemicals which lyse cells/ destroy membrane
substance that stimulate an immune response ( adaptive immunity)
Antigen
molecule produced by the person’s body that stimulates an immune system response
prevents immune system from attacking cells of the body its producing
self-antigen
proteins the body produces in response to an antigen
antibody