The lymphatic system
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The Lymphatic System. Unlike circulatory system, one-way only Collects tissue fluid, returns to blood Consists of a series of lymph capillaries, lymphatic vessels, and lymphatic organs Fluid directed by one-way valves Blood plasma  tissue fluid  lymph

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The lymphatic system
The Lymphatic System

  • Unlike circulatory system, one-way only

  • Collects tissue fluid, returns to blood

  • Consists of a series of lymph capillaries, lymphatic vessels, and lymphatic organs

  • Fluid directed by one-way valves

  • Blood plasma  tissue fluid  lymph

  • Lymph nodes filter fluid as it passes

  • Macrophages engulf pathogens, clean up

  • Lymphocytes “watch” for pathogens also

  • Infections lead to swollen lymph nodes


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