FedEx for your cells: extracellular vesicles.
Consider this your friendly reminder that we mostly still have no idea how biology works. “Scientists are learning ever more about how vesicles move in and out of cells and across the complex terrain between them, as well as about the roles of vesicles in health and disease. EVs might, for example, be responsible for cancers spreading in the body, or could even be involved in the ageing process.” ~ learn more