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The Lymphatic system

The Lymphatic system. AND IMMUNITY. What is in the lymphatic system?. Components are : Lymph, vessels, lymph nodes, tonsils, the spleen, and the thymus gland Jobs of this system include : Fluid Balance – restores interstitial fluid to the circulatory system

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The Lymphatic system

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  1. The Lymphatic system AND IMMUNITY

  2. What is in the lymphatic system? • Components are: Lymph, vessels, lymph nodes, tonsils, the spleen, and the thymus gland • Jobs of this system include: Fluid Balance – restores interstitial fluid to the circulatory system • Fat Absorption – lacteals, which are lymphatic capillaries absorb fat from the small intestine • Defense- Pathogens are filtered from the lymph in nodes and can be destroyed by lymphocytes

  3. Edema of the legs: Edema (swelling due to fluid retention) happens when excess fluid builds up around tissues

  4. A lymph node is an oval organ surrounded by fibrous connective tissue that filters pathogens from the lymph fluid. It contains many immune cells

  5. What are tonsils? • Large groups of lymphatic nodules and tissues • Keep pathogens from entering the pharynx • Inflamed or enlarged tonsils can be removed

  6. WhAT DOES THE SPLEEN DO? • It is about the size of your fist • It destroys defective RBC’s • It responds to foreign (non-self) substances in the blood • Macrophages clean up debris • It also stores small amounts of blood

  7. The thymus gland? • Site of T cell maturation • Decreases in function throughout life • By age 50 – it is only 20% functional • By age 70 – it is mostly gone

  8. Help your immune system . . . Whack – A – Germ! http://primaryimmune.org/idf-arcade/whack_a_germ

  9. video http://www.youtube.com/watch?v=Kh-XdNnTZUo&feature=related

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