A. Vessels: Collect and transport lymph (interstitial fluid before it enters the vessels), one way, valves, skeleton muscles help push the fluid up to the heart to be re-joined with blood
B. Tissues/ Organs: Nodes (Armpit, groin, neck) (where the vessels are enlarged, check/ filter for pathogens, activate WBCs), Organs (Spleen, liver, tonsils, thymus, Peyer's patches, appendix, pancreas) filter blood, activate WBC
