What is the definition of Permalink Blood Cells?

Permalink blood cells are like the unsung heroes of the circulatory system, tirelessly working to keep our bloodline intact without drawing any unnecessary attention to themselves. They're the unassuming, invisible knights of the bloodstream, always ready to lend a hand in emergencies, but usually preferring to stay hidden behind a thick veil of red and white.

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Example sentence: "As the detective chased the ghost, I realized the only clue was a permanent link between the blood cells and the missing person – a red and white blood cell perlance that somehow ended up on the crime scene."