How does the body heal a cut?
You slice your finger on a piece of paper. Ouch! A tiny red line appears, and for a moment you can see into your own skin — deeper than you've ever looked before. Then the blood starts to well up. What happens next is one of the most precisely choreographed rescue operations in nature, all happening in a space smaller than the period at the end of this sentence.
The instant the cut opens, blood vessels tear and blood starts pouring out like water from a broken pipe. Your body's first alarm goes off immediately: damaged cells release chemical signals — distress flares, essentially — that scream "EMERGENCY HERE!" into the bloodstream. Within seconds, tiny cell fragments called platelets start rushing toward the scene. Platelets are like living sandbags, and right now they're racing to plug the leak.
