Why Do Scabs Form? | Body Science for Kids
Why do scabs form on a scraped knee? Discover how your body builds a microscopic shield against germs in this homeschool STEM body science episode.
When you take a spill and scrape your knee, an emergency alarm sounds inside your body. Instantly, a microscopic repair crew springs into action to protect the open breach. Millions of tiny blood cells called platelets race to the scene, sticking together like magnetic building blocks to plug the leak, while protein threads called fibrin weave an invisible safety net across the cut. Together, they create a tough, drying shield known as a scab…
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