Platelets & Blood Clotting | Biology | FuseSchool

Do you remember tripping over as a kid and cutting your knee? And then like magic the bleeding suddenly stops? Have you ever wondered why this happens?

Our body is very clever and produces substances to seal off the open wound.

In this video we are going to look at how and why blood clots.

Clotting prevents us from bleeding to death, and also protects us from nasty disease-causing organisms, called pathogens, entering our body.

When we injure ourselves, we can damage the blood vessels just below our skin. This can cause blood to either leak into our tissue and form a bruise, or, if the skin is broken to openly bleed.

To prevent these horrible things happening, blood clotting occurs.