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Download 30.6 Lymphatic System KEY CONCEPT The lymphatic system provides another type of
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Transcript
30.6 Lymphatic System KEY CONCEPT The lymphatic system provides another type of circulation in the body. 30.6 Lymphatic System Lymph is collected from tissues and returned to the circulatory system. • The lymphatic system collects fluid that leaks out of the capillaries. heart – Lymph vessels have valves to prevent backflow. – Lymph nodes filter the lymph lymph nodes and destroy foreign matter. – Lymph vessels return cleaned lymph vessels fluid to the circulatory system. • If lymph vessels or nodes are damaged, lymph collects in an area. 30.6 Lymphatic System The lymphatic system is a major part of the immune system. • Structures in the lymphatic system help fight disease. – tonsils filter bacteria and viruses – thymus develops white blood cells – spleen filters lymph, contains immune cells tonsils thymus spleen • Lymphocytes help destroy pathogens, parasites, and foreign matter.