Thrombosis facts for kids

Thrombosis (say: throm-BOH-sis) is when a blood clot forms inside a blood vessel. This clot, called a thrombus, can block the normal flow of blood through your circulatory system.

When you get a cut or injury, your body is amazing! It quickly uses tiny cells called platelets and a special protein called fibrin to create a blood clot. This is a good thing, as it stops you from losing too much blood.

But sometimes, a clot can form when it's not needed, or it can become too big. When this happens inside a blood vessel, it can cause problems because it stops blood from reaching where it needs to go.

How Blood Clots Form

Your blood has different parts that work together. When a blood vessel is damaged, it sends out signals. These signals tell platelets to rush to the injury site. Platelets are like tiny sticky patches. They clump together to form a plug.

Then, fibrin acts like a strong net. It weaves around the platelets, making the clot stronger and more stable. This process is usually very helpful for healing. It's like your body's own repair crew.

Why Unwanted Clots Are a Problem

When a thrombus forms inside a healthy blood vessel, it can be dangerous. Imagine a hose with water flowing through it. If something blocks the hose, the water can't get through. It's similar with your blood vessels.

If a clot blocks a blood vessel, the parts of your body that rely on that blood supply won't get enough oxygen and nutrients. This can lead to serious health issues, depending on where the clot forms.

For example, a clot in a leg vein is called deep vein thrombosis (DVT). A clot that travels to the lungs is called a pulmonary embolism. These are serious conditions that need medical attention.

Images for kids

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  Acute thrombus in the right MCA M1 branch

See also

In Spanish: Trombosis para niños