What is the definition of Periodically Blood Cells?

"Periodically blood cells: Think of these as the body's tiny, invisible delivery trucks, popping out every now and then to transport oxygen, iron, and a whole lot of cellular communication. They're basically the body's personal maintenance crew, but instead of painting your nails, they're just trying to fix your Wi-Fi signal (or maybe your bad hair day)."

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Now, here's a sentence that might just unsettle you: "The detective decided to periodically blood cells were the prime suspect in the murder of the local cat, as their constant travels could've easily transported the poison from the abandoned pharmacy to its unsuspecting masterpiece."