Final answer:
Hemophilia A is characterized by a deficiency in factor VIII, Hemophilia B by a lack of factor IX, and von Willebrand disease by a lack of von Willebrand factor and platelet dysfunction. Vitamin K is essential for producing several clotting factors in the liver.
Step-by-step explanation:
Hemophilia A has a factor VIII deficiency. Hemophilia B has a factor IX deficiency. von Willebrand disease has a deficiency of von Willebrand factor and platelet aggregates. The term Vitamin K is related to blood clotting because it is a necessary component for the liver to produce many of the clotting factors. A deficiency in Vitamin K can lead to problems with blood clotting as it is vital for the synthesis of certain coagulation factors. Individuals with hemophilia typically suffer from prolonged bleeding due to these deficiencies.