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The Lymphatic System

The Lymphatic System. By: Seraphín and Emma. What is it?. Network of vessels that: - Collect fluids lost by blood & returns it to circulatory system. Clears away infection. Keeps body fluids in balance. The Process of the Lymphatic System I.

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The Lymphatic System

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  1. The Lymphatic System By: Seraphínand Emma

  2. What is it? • Network of vessels that: - Collect fluids lost by blood & returns it to circulatory system. • Clears away infection. • Keeps body fluids in balance.

  3. The Process of the Lymphatic System I Fluid from circulatory system leaks into tissue. Lymph (fluid) collects in lymphatic capillaries. Slowly flows into larger lymph vessels.

  4. Process of Lymphatic System II 4. Lymph vessels - contain valves 5. Valves- prevent lymph from flowing backward. 6. Ducts collect lymph & return it to circulatory system. 7. Lymph goes through 2 openings in superior vena cava.

  5. The Lymphatic system is not a closed system. It carries fluid through all parts of the body. See the blue.

  6. Lymph Nodes Act as filters. -trap bacteria that cause disease. -“swollen glands” are swollen lymph nodes. (colds) -house specialized white blood cells called lymphocytes.

  7. Lymph Vessels Return excess fluid to circulation. Nutrient absorption. -Lie near cells that line intestine & absorb: fats and fat soluble vitamins (A, D, E, and K). -from the digestive tract. -carry them to the blood.

  8. Small intestine – where the white lines are lymph vessels that absorb nutrients. The small white patch with LN in it is a Lymph node.

  9. Spleen Mass of lymphatic tissue. Acts as a blood filter. Destroys damaged red blood cells and platelets.

  10. Thymus Produces & ‘educates’ T- Cells . T- cells are white blood cells - produce hormones to promote development. Bone marrow also produces the cells in lymph -they both work together

  11. Thoracic Duct Largest lymphatic vessel in body. Collects most of the lymph. Drains lymph into the blood. Connected to the Superior Vena Cava.

  12. Diseases in the Lymph System • Lymphedema- • Occurs when lymphatic vessels are blocked. • If fluid builds in tissues, starts to swell. • Primary cause– present at birth, most common in females • Others problems include: infections, blockage, and cancer. E.g. Hodgkin's Lymphoma

  13. Lymphedema Symptoms

  14. Facts More than 3 liters of fluid leak from the circulatory system into surrounding tissues every day. It is VERY important that there is a steady flow of lymphthrough out Lymph means ‘white’ in Greek Lymph is not directly pumped by the heart, it has its own system that flows upward toward the neck from the feet and hands. http://www.youtube.com/watch?v=qTXTDqvPnRk

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