Yet the blood vessels, they extend from the surface of the brain down to reach every single cell in the brain, which means that fluid that's traveling along the outsides of these vessels can gain easy access to the entire brain's volume, so it's actually this really clever way to repurpose one set of vessels, the blood vessels, to take over and replace the function of a second set of vessels, the lymphatic vessels, to make it so you don't need them.
Mais os vasos sanguíneos si se estenden desde a superficie ata o interior para chegar  a todas as células do cerebro, o que significa que o líquido que circula polo exterior destes vasos pode chegar facilmente  a todo o volume do cerebro, polo que é unha maneira moi intelixente de facer que un conxunto de vasos,  os vasos sanguíneos, asuma e substitúa a función dun segundo conxunto de vasos,  os vasos linfáticos, e evite así que sexan necesarios.