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Lymphatic System

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Functions of the Lymphatic System. Fluid Balance - returns interstitial fluid to the blood ... Immunity - using lymphocytes & phagocytes microorganisms are ... – PowerPoint PPT presentation

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Title: 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
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