What is the definition of Stands Blood Cells?

"Standing blood cells are like the sentinels of our circulatory system - always vigilant, always ready to spring into action, but sometimes they're just so busy patrolling their territories that they forget to breathe! Imagine this in a dark, underground library: 'The blood cell patrols were so focused on avoiding dust bunnies they forgot to breathe, which is why the librarian was breathing down their necks!'"

---

And here's a bit unsettling example: "Despite being the lifeline of our body, standing blood cells can sometimes feel like a tiny, pulsating assassin on a mission to steal our oxygen supply!"