Lymph nodes are sponges inside our bodies Both in their function and in their structure. After all, the task of lymph nodes is to "absorb" everything that the body needs to remove from its tissues - foreign particles, microorganisms and its own dead cells. And in their structure they resemble a sponge, as they literally pass through themselves lymph - the fluid that carries all of the above, complete with immune cells. And another association can be made between lymph nodes and sponges. The nodes contain memory cells or antibodies - special immune system cells that store information about bacteria and viruses that have previously entered the body.