Some stay in landfills, but these are often blown by the wind into waterways and urban drainage networks, eventually making their way out to sea. (treehugger.com)
The Lymphatic System is a drainage network of fluid, organs and vessels that is responsible for the removal of cellular debris, large proteins, foreign bodies, pathogenic agents (bacteria, viruses, toxins etc.) and excess fluid from the extracellular spaces. (diagnose-me.com)