Relationship dynamics are as intricately woven, possibly more complex than the scientific confusion explaining the blood clotting process. Picture this; thromboplastin is an enzyme largely resident in the platelets.
Its primary function is to convert prothrombin to thrombin in the clotting process to stop bleeding. In some contexts, the same enzyme is called thrombokinase and is said to be present in the brain and lungs. Whatever it does there, we cannot tell because those two organs rarely heal if they bleed.