Now, notice that the black arrows ultimately converge with the blue arrows at this particular location where we designated with the star. And so actually, the intrinsic and the extrinsic pathway do converge at a single point and then they go on to form the final pathway, known as the final common pathway or simply the final pathway. So this is shown with the red arrow. So let's begin by describing the quick acting pathway, the extrinsic pathway, and this is shown by these black arrows. So question number one is how exactly do we initiate what begins the extrinsic pathway? Well, let's suppose somehow this endothelial cell ruptures.