which of the following are involved in the clotting process.

Which "following?"

http://www.ehow.com/how-does_5375783_blood-clot-process.html

To determine which of the following are involved in the clotting process, we need to identify the components and factors required for blood clot formation. Here is a list of typical elements involved in the clotting process:

1. Platelets: Platelets play a crucial role in clotting by forming a plug at the site of injury and initiating the clotting process.
2. Coagulation factors: These are proteins present in the blood plasma that work together to form a blood clot. There are multiple coagulation factors, numbered as Roman numerals from I to XIII, and they act in a specific sequence to form a clot.
3. Fibrinogen: This is a soluble protein that gets converted into insoluble threads of fibrin during clot formation. Fibrin creates a mesh-like structure, binding platelets and other blood components together to form a stable clot.
4. Calcium ions: Calcium ions are essential for the activation of various coagulation factors involved in clotting.
5. Vitamin K: Vitamin K is necessary for the formation of certain clotting factors, specifically factors II (prothrombin), VII, IX, and X.
6. Endothelial cells: These cells line the blood vessels and play a role in preventing blood clotting by producing substances that regulate clotting.
7. Thrombin: Thrombin is an enzyme derived from prothrombin (a clotting factor) and is responsible for converting fibrinogen into fibrin.

To identify the elements involved in clotting, you can refer to various textbooks, medical resources, or reliable websites specializing in hematology or coagulation biology.