What is the definition of Lived Blood Cells?

"Lived blood cells" are like the best of friends who have been around for way too long, but they're not exactly the most trendy. They're the unsung heroes of our bloodstream, always circulating, fighting off invaders, and making sure our bodies don't turn into a buffet for nasty bacteria. But let's get a bit edgy: "The lived blood cells in her veins seemed to be whispering 'Beware the vampire' just because they had been around for centuries." Talk about a blood-brain connection!