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The Science of Scabs

every kid's life

Scabs - Nature's Band-Aid

Scabs are nature's Band-Aid. They start to form less than 10 seconds after you cut yourself. Chemical proteins react with special blood cells called platelets, which cause the blood to get sticky and clump together. This forms a clot that plugs up the cut to stop the bleeding. Once you've clotted, 16 different chemicals work together to dry out the clot and form a scab. The scab keeps out germs while the cells underneath make new skin.

Scabs - White Blood Cells Chow-Down

White blood cells, which are the cells in charge of fighting off disease, arrive on the scene and chow down on any germs that sneak past the scab, as well as some of your dead blood and skin cells. Yum.

Scabs - That Icky Yellow Stuff

Piles of living and dead germs and cells form pus, which cause some swelling and puffiness around your wound.

Scabs - Don't Pick A Scab!

I know your parents always tell ya this, but they're not just grossed-out by the bloody mess you'll make. If ya pick a scab, you're messing with all the hard work your body is doing to fix itself. If you leave it alone to do its thing, a cool new kind of cell, called a macrophage arrives. They eat all the pus, dead white cells and other debris. Within a week or two, the scab should fall off all by itself.

Scabs - Did U Know?
  • Watch out! Vampire bats have chemicals in their spit that prevent scabs from forming. This makes it easier for them to snack on their victim's blood. So don't get spit on by a vampire bat if you've got an open wound.
  • If you dream about scabs, it could mean that money is coming your way.
  • For a cool scab recipe click here.
  • Related stories:
  • Bone Up on Boogers
  • How Blood Carries Oxygen
  • The Ins and Outs of Burping
  • More Cool Science...
  • 8 Comments

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    F1138299959156

    What's the Grossest Body Function?

    • Poop.
    • Scabs.
    • Pee.
    • Puke.

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    There's a lot of evidence, my friend. First evidence is that Trump is not allowing trans to join the army. The Muslim ban? He's such a racist and such a discriminator...do you want me to give you more evidence?
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    Tennis123
    Tennis123 posted in Debating:
    And btw, it’s acceptable for a person to defend himself from the polar bear or whatever animal
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    Tennis123
    Tennis123 posted in Debating:
    "Kirsteeeeen" wrote: "Tennis123" wrote: i have changed my views on things like this, i think 99% of people that hunt and the people that complain about the hunting are complete hypocrites though.  if you think that its justified to kill an animal in a given context, you must have a difference between a human and the animal that if true of the human would justify killing the animal, otherwise you say X justifies killing something but doesnt justify killing something ate the same time, which of course is a contradiction. hopefully people can understand that.  What gives, polar bears for example, the right to kill humans for food but doesn't give humans the right to kill an animal for food? Polar bears have no moral agency and they must kill for food. If we went over to a place in the North Pole and a mentally disabled person with the inability to understand right and wrong and they had to kill for food, I wouldnt add any moral weight to the act they commit bc how can you morally judge an act one commits without them having any conception of morals? Some mentally disabled people have no moral agency and can’t really understand anything. Would you judge them morally? 
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