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glossary:lymph_node

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glossary:lymph_node [2007/09/03 18:53]
Pat O'Connor
glossary:lymph_node [2012/10/16 14:40] (current)
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 +====== Lymph Node ======
  
 +Small bean-shaped organs of the [[glossary:​immune system|immune system]], distributed widely throughout the body and linked by [[glossary: lymphatic vessels]]. [[glossary:​Lymph nodes]] are garrisons of B, T, and other immune cells.  ​
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 +Small bean-shaped organ made up of a loose meshwork of reticular tissue in which are enmeshed large numbers of [[glossary:​lymphocytes]],​ [[glossary:​macrophage|macrophages]] and accessory cells located along the lymphatic system. ​
 +
 +Recirculating lymphocytes leave the [[glossary:​blood|blood]] through the specialised high [[endothelial]] venules of the lymph node and pass through the node before being returned to the blood through the lymphatic system. Because the lymph nodes act as drainage points for [[tissue]] fluids, they are also regions in which foreign [[antigen]]s present in the tissue fluid are most likely to begin to elicit an [[immune response]]. Nodes filter out [[glossary:​bacteria]] or [[glossary:​cancer]] [[cell]]s that may travel through the [[glossary:​lymphatic system|lymphatic system]]. ​
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 +{{glossary:​lymphnode.jpg|}}
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 +{{glossary:​lymphnode2.jpg|}}
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 +See also: [[glossary:​lymphatic system]] ​
glossary/lymph_node.txt ยท Last modified: 2012/10/16 14:40 (external edit)