Final answer:
The spleen is the structure in the lymphatic system that filters the blood and destroys pathogens.
Step-by-step explanation:
The structure of the lymphatic system that filters the blood and destroys pathogens in the blood is the spleen.
The spleen acts as a filter, removing old or damaged red blood cells, as well as foreign substances, including pathogens.
It contains specialized cells called macrophages, which engulf and destroy these pathogens, helping to protect the body against infections.
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