Lymphatic System

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Lymphatic System
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Functions of the Lymphatic System

• Fluid Balance - returns interstitial fluid to
  the blood
• Fat and fat soluble vitamins Absorption - from
  the digestive tract via lacteals into the venous
  circulation
• Immunity - using lymphocytes phagocytes
  microorganisms are filtered and removed from
  circulation

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Components

• Lymph - fluid similar to plasma
• Lymphatic Vessels - begin with blind-ended sacs
  at capillaries, and merge to form lymphatic
  vessels - similar to veins in structure. Vessels
  merge and drain into trunks which dump lymph
  into ducts
• right lymphatic duct
• thoracic duct

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Lymphatic Organs

• Lymph Nodes - round, oval or bean shaped, less
  than 2.5 cm in length. Distributed throughout
  body, except for CNS bone marrow.

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Lymphatic Organs

• Tonsils - 3 groups pharyngeal adenoids,
  palatine, lingual
• Spleen - filters blood, not lymph
• Thymus
• Appendix

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Human T-Lymphocyte
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Immunity Latin immunis exempt 2 main
functions recognition response can be innate -
born with - will not be specific or acquired /
adaptive - will be specific, due to memory long
or short term memory Innate - 4 types of
defensive barriers anatomic, physiologic,
phagocytic, inflammatory