Lymphatic system

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Lymphatic system

  1. 1. Construct Interactive Notes(last one of the year!)• 5 pages of binder paper• On cover, write:Chapter 14: Lymphatic and Immune SystemsName, period, seat #• Number the pages
  2. 2. Lymphatic System (pg 2)
  3. 3. Lymphatic System (pg 2)• Consists of lymphatic vessels and lymphoidorgans
  4. 4. Lymphatic System (pg 2)• Consists of lymphatic vessels and lymphoidorgans• Functions: returns excess interstitial fluid tothe blood, absorbs fat and fat-soluble vitaminsfrom the digestive system, defends againstdisease by filtering out microorganisms
  5. 5. Lymph• A fluid similar in composition to blood plasma
  6. 6. Lymph• A fluid similar in composition to blood plasma• When blood passes through capillaries,plasma leaks out, becoming interstitial(“between the cells”) fluid
  7. 7. Lymph• A fluid similar in composition to blood plasma• When blood passes through capillaries,plasma leaks out, becoming interstitial(“between the cells”) fluid• This fluid needs to be returned to the blood orit will accumulate in the tissues, causingedema
  8. 8. Lymph• A fluid similar in composition to blood plasma• When blood passes through capillaries,plasma leaks out, becoming interstitial(“between the cells”) fluid• This fluid needs to be returned to the blood orit will accumulate in the tissues, causingedema• Once the interstitial fluid enters the lymphcapillaries, it is called lymph
  9. 9. Lymphatic Vessels• Carry fluid only in one direction (away fromthe tissues, toward the heart). Like veins, theyhave valves that prevent backflow.
  10. 10. Lymphatic Vessels• Carry fluid only in one direction (away fromthe tissues, toward the heart). Like veins, theyhave valves that prevent backflow.• Lymph capillaries: smallest lymphatic vessels.
  11. 11. Lymphatic Vessels• Carry fluid only in one direction (away fromthe tissues, toward the heart). Like veins, theyhave valves that prevent backflow.• Lymph capillaries: smallest lymphatic vessels.• Capillaries merge to form lymphatic vessels,which merge into lymphatic trunks, which leadto the two lymphatic ducts
  12. 12. Lymphatic Vessels• Carry fluid only in one direction (away fromthe tissues, toward the heart). Like veins, theyhave valves that prevent backflow.• Lymph capillaries: smallest lymphatic vessels.• Capillaries merge to form lymphatic vessels,which merge into lymphatic trunks, which leadto the two lymphatic ducts• Right lymphatic duct drains the upper rightquadrant of the body. Thoracic duct drainsremaining ¾ of body.
  13. 13. Lymphatic Vessels• Carry fluid only in one direction (away from thetissues, toward the heart). Like veins, they havevalves that prevent backflow.• Lymph capillaries: smallest lymphatic vessels.• Capillaries merge to form lymphatic vessels,which merge into lymphatic trunks, which lead tothe two lymphatic ducts• Right lymphatic duct drains the upper rightquadrant of the body. Thoracic duct drainsremaining ¾ of body.• Both ducts empty into the subclavian vein
  14. 14. Lymphatic Organs1. Lymph nodes
  15. 15. Lymphatic Organs1. Lymph nodes– small, bean shaped structures
  16. 16. Lymphatic Organs1. Lymph nodes:– small, bean shaped structures– Widely distributed throughout the body along thelymphatic pathways
  17. 17. Lymphatic Organs1. Lymph nodes:– small, bean shaped structures– Widely distributed throughout the body along thelymphatic pathways– Most numerous in the neck, armpit, and groin
  18. 18. Lymphatic Organs1. Lymph nodes:– small, bean shaped structures– Widely distributed throughout the body along thelymphatic pathways– Most numerous in the neck, armpit, and groin– Function: Filter the lymph
  19. 19. Lymphatic Organs1. Lymph nodes:– small, bean shaped structures– Widely distributed throughout the body along thelymphatic pathways– Most numerous in the neck, armpit, and groin– Function: Filter the lymph– Contain lymphocytes and macrophages, whichremove bacteria, viruses, cancer cells, anddamaged cells
  20. 20. 2. Tonsils
  21. 21. 2. Tonsils–Clusters of lymphatic tissue
  22. 22. 2. Tonsils–Clusters of lymphatic tissue–3 pairs of tonsils (pharyngeal, palatine, andlingual)
  23. 23. 2. Tonsils–Clusters of lymphatic tissue–3 pairs of tonsils (pharyngeal, palatine, andlingual)–Contain lymphocytes and macrophages,which destroy pathogens that enterthrough the nose or mouth
  24. 24. 3. Spleen–Largest lymphatic organ
  25. 25. 3. Spleen–Largest lymphatic organ–Curves around the left side of the stomach
  26. 26. 3. Spleen–Largest lymphatic organ–Curves around the left side of the stomach–Filters the blood (in the same way thelymph nodes filter the lymph)
  27. 27. 3. Spleen–Largest lymphatic organ–Curves around the left side of the stomach–Filters the blood (in the same way thelymph nodes filter the lymph)–Acts as a reservoir for blood
  28. 28. 4. Thymus–Gland located behind the sternum
  29. 29. 4. Thymus–Gland located behind the sternum–Involved in maturation of T-lymphocytes
  30. 30. 4. Thymus–Gland located behind the sternum–Involved in maturation of T-lymphocytes–Produces the hormone thymosin
  31. 31. Diagram (pg 3)• Label as a class

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