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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

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The Lymphatic System

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  1. 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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