So they are circulating inside that blood plasma. And anytime we have a rupture that takes place. Because these are found inside the blood plasma, they are ready to be activated and they are ready to basically form those blood clots. Now, the second thing we should notice is it looks rather complicated and that's because we have over a dozen different types of enzymes and proteins involved in the process of the blood clot and cascade. So the rather difficult aspect about this cascade is remembering the different types of enzymes and how they interact with one another to form these blood clots. So, to make things easier, let's actually divide our process into three different processes.