Which of the following are required for blood to clot?Multiple select question.White blood cellsPlateletsAntibodiesClotting factorsCytokines

To determine which components are required for blood clotting, we need to understand the roles of the listed items in the coagulation process.

1. White Blood Cells: These cells are primarily involved in the immune response and do not play a direct role in blood clotting.

2. Platelets: These are essential for blood clotting. They help form the plug that initially stops bleeding by adhering to the site of injury.

3. Antibodies: These are proteins that are part of the immune system and are not directly involved in the clotting process.

4. Clotting Factors: These are specific proteins in the blood plasma that actively participate in the coagulation cascade. They are crucial for the formation of a stable blood clot.

5. Cytokines: While they are signaling molecules that can influence various processes including inflammation, they are not directly involved in the clotting mechanism.

Final Answer

The components required for blood to clot are:

• Platelets
• Clotting factors

So, the correct answers are Platelets and Clotting factors.