Lymphatic system
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Lymphatic system

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Lymphatic system Lymphatic system Presentation Transcript

  • 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
  • Lymphatic System (pg 2)
  • Lymphatic System (pg 2)• Consists of lymphatic vessels and lymphoidorgans View slide
  • 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 View slide
  • Lymph• A fluid similar in composition to blood plasma
  • Lymph• A fluid similar in composition to blood plasma• When blood passes through capillaries,plasma leaks out, becoming interstitial(“between the cells”) fluid
  • 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
  • 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
  • Lymphatic Vessels• Carry fluid only in one direction (away fromthe tissues, toward the heart). Like veins, theyhave valves that prevent backflow.
  • 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.
  • 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
  • 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.
  • 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
  • Lymphatic Organs1. Lymph nodes
  • Lymphatic Organs1. Lymph nodes– small, bean shaped structures
  • Lymphatic Organs1. Lymph nodes:– small, bean shaped structures– Widely distributed throughout the body along thelymphatic pathways
  • Lymphatic Organs1. Lymph nodes:– small, bean shaped structures– Widely distributed throughout the body along thelymphatic pathways– Most numerous in the neck, armpit, and groin
  • 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
  • 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
  • 2. Tonsils
  • 2. Tonsils–Clusters of lymphatic tissue
  • 2. Tonsils–Clusters of lymphatic tissue–3 pairs of tonsils (pharyngeal, palatine, andlingual)
  • 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
  • 3. Spleen–Largest lymphatic organ
  • 3. Spleen–Largest lymphatic organ–Curves around the left side of the stomach
  • 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)
  • 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
  • 4. Thymus–Gland located behind the sternum
  • 4. Thymus–Gland located behind the sternum–Involved in maturation of T-lymphocytes
  • 4. Thymus–Gland located behind the sternum–Involved in maturation of T-lymphocytes–Produces the hormone thymosin
  • Diagram (pg 3)• Label as a class