when you get a scratch or cut why does it bleed??

Question

if your blood runs through veins in your body why do we bleed if we pick a scab, get a cut or a scratch?? that never made sense to me

Answer 1

This happens because the injury breaks or tears the tiny blood vessels that live right under the skin's surface. Your body wants to stop the bleeding so the platelets in your blood come to the rescue.

At the site of a wound , which is another word for injury, platelets stick together, like glue. This is called clotting, which works like a plug to keep blood and other fluids from leaking out. A scab, a hardened and dried clot, forms a crust over the wound. This protects the area so the cells underneath can have time to heal.

Underneath the scab, new skin cells multiply to repair the wound. Damaged blood vessels are repaired, and infection-fighting white blood cells attack any germs that may have gotten into the wound. You can't see it under the scab, but a new layer of skin is forming. And when the new skin is ready, the scab falls off.

Answer 2

It's because the veins are actually large blood vessels in the body, and they branch off into smaller blood vessels named capalaries. The capalaries a lot closer to the skin surface than an arterey or vein. So, when a scab is picked off or when we cut/scratched, it's the capalary that was cut. I hope that made sense.

Answer 3

There are thousands upon millions of vessels in your body, not just main ones. Scabs occur when the blood has coagulated (the body's natural defense against blood loss, platelets get "stuck" in the wound and cause it to scab over) and when you pick the scab off, it bleeds freely again.

Answer 4

Im not some expert on this but, look...
Though blood runs through veins and stuff, it still needs to reach its "destination" (the actual organs). So for example, it will reach the surface of the skin so that it can detoxify and do some good stuff to the skin.

Thats why when you get a cut you bleed.

Answer 5

Blood doesn't just run through the guts of your body. It branches off to capillaries that send blood to every living area of the body. Because the skin is the largest organ of the body, it is filled with them. When you cut yourself you are rupturing these tiny vessels. That is why you bleed out. Check out any circulatory website to understand it better.

Answer 6

Because the cut usually injures a vein, artery, cappillary or some such, and interrupts the flow and causes the blood to escape out of the cut.

Answer 7

your veins and arteries branch out into smaller vessels called capillaries.

These supply your cells with nutrients and oxygen.

You prick yourself, the vessels get damaged and blood oozes/gushes out.

Answer 8

it you body's natural way to clean out the wound.

Answer 9

thats a good question

Answer 10

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