To solve the problem, we need to identify the vitamin responsible for the coagulation of blood.
1. Understanding Coagulation:
Coagulation refers to the process of blood clotting, where blood changes from a liquid to a gel, preventing excessive bleeding after injury. This process involves a series of proteins in the blood, known as clotting factors, which are activated in a cascade to form a blood clot.
2. Role of Vitamin K:
Vitamin K plays a crucial role in blood coagulation. It is required for the synthesis of certain clotting factors in the liver, particularly prothrombin (factor II) and factors VII, IX, and X. These clotting factors are essential for the formation of a blood clot. Without sufficient vitamin K, blood clotting is impaired, leading to excessive bleeding.
3. Final Answer:
The vitamin responsible for blood coagulation is Vitamin K.