Table of Contents: The Lymphatic System Supports Cardiovascular Function 2:09 Collects, Filters, and Returns Interstitial Fluid Back to the Bloodstream 3:12 Lymphatic Vessels 4:22 Role In Fighting Off Infection 5:40 Lymph Nodes, Lymphoid Organs, and Malt Areas House Antigen-Attacking Lymphocytes 6:04