Now, our platelets actually function in the blood clotting process. So they travel along our blood vessels until they come to a cut or a hole in the lithium of our blood vessel. And then they stick to that hole and they initiate a process. They release chemicals that initiate the blood clotting process. And we'll discuss this process in much more detail when we'll discuss the immune system and the blood clotting cascade. So these are the three different types of cells that are found within our blood blood.