Because once again, it's the number ten that will combine with the factor five to form a dimer complex that will go on and ultimately lead to the formation of our blood clot. So we have these two pathways, the extrinsic and the intrinsic that eventually create many of these separate pathways that amplify the number of these complexes that we form. And once they converge this complex goes on and forms our blood clots as we'll see in just a moment. So once again, let's review the intrinsic pathway. So when blood vessel ruptures inactive protein factor twelve is exposed to the collagen in the tissue surrounding our blood vessel and this activates factor twelve. Now activated.