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Lymphatic and Immune Systems

Lymphatic and Immune Systems - Lymphatic and Immune Systems...

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Lymphatic and Immune Systems Function The lymphatic system is a vascular system that functions in absorption of ingested dietary lipids (recall the lacteals in the villi of the intestines), maintenance of blood volume, and immunity . Fluid Recovery Lymph is composed of water and solutes. It is very similar in composition to blood, but contains fewer proteins and cells. As the blood circulates, it flows through capillary beds where transport of solutes and water into or out of the blood occurs. As solutes move out of the blood and into the tissues, water is lost from the blood (moving into the tissues). Much, but not all, of this water is reabsorbed into the capillaries. The remaining fluid is absorbed into lymphatic capillaries when interstitial pressure is higher than in the lymphatic capillaries and deposited back into the venous blood supply through the subclavian veins. Disruption of the lymphatic drainage of tissues leads to edema . (See Figure 1) Figure 1 Immunity Before the lymph is returned to the general circulation, it is filtered through the lymph nodes.
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