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18 Cards in this Set

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immune system
is the body's defense system against infection
- it provides the body with resistance to invading organisms and enables it to fight off invaders once they have gained access

- it recognizes, isolates, and destroys pathogens
bone marrow
is the principle site for blood cell formation
lymphatic system
returns excess interstitial fluid in the blood, absorbs fats and fat soluble vitamins, and provides defense against disease
lymphatic vessels
carry fluid away from the tissues
right lymphatic duct
drains lymph from the upper right quadrant of the body

- the thoracic duct drains all the rest
where is the thoracic duct?
the main lymphatic duct in the abd, which passes upward through the diaphragm in the thorax, continuing upward alongside the aorta and esophagus to the neck, where it turns to the left and enters the left subclavian vein
lymphatic system
pressure gradients that move fluid through the lymphatic vessels come from the skeletal muscle action, respiratory movements, and contraction of smooth muscle in vessel walls
lymphatic system
lymph enters a lymph node through afferent vessels, filters through the sinuses, and leaves through efferent vessels
lymph nodes
are round or kidney shapes clusters of mononuclear cells that normally are less than 1 cm in diameter
body organs that are part of a functioning immune system
- bone marrow
- lymph nodes
- spleen
- thymus
antigens
are foreign substances that stimulate a response from the immune system, whereas antibodies are proteins that are produced by the immune system to help eradicate antigens
innate immunity
present in the body at birth
acquired immunity
develops after birth
- as a result of the body's immune response to specific antigens
2 types of acquired immunity
antibody mediated and cell mediated
immunodeficiency
occurs when the body is unable to launch and adequate immune response, resulting in and increased risk of infection
two main types of leukemia
myolegenous and lymphocyctic
allergy or hypersensitivity
occurs when a normally inoffensive foreign substances stimulates and atypical or exaggerated immune response
systemic lupus erythematous
is considered an autoimmune disorder