what are the three main organs of the lymphatic system quizlet?
['Lymphatic Vessels. their function is to pick up excess tissue fluid, called lymph and return it to the bloodstream.', 'Lymphnodes. ... ', 'Other Lymphatic Organs. ... ', 'Spleen. ... ', 'Thymus. ... ', 'Tonsils. ... ', "Peyer's Patches. ... ", 'Bone Marrow.']