Also known as the Immune System!
Composed of (organs)...
~ Lymph nodes
~ Lymph vessels
~ Helps protect the body against infection
~ Collects and removes waste from cells
~ Returns to the blood supply fluid and proteins that have moved out of the blood vessels.
~ Transports lipids from the small intestine to the blood stream.
~ Houses lymphocytes that defend the body against invasion by microbes, foreign cells, toxins, and cancer cells