Blood coagulation occurs with the help of:

Correct option is B

Correct Answer: (B) Platelet cells

Explanation:

• Platelet cells (also called thrombocytes) are crucial in the process of blood coagulation.
• When a blood vessel is injured, platelets are activated and stick to the site of injury, forming a temporary plug.
• They release various chemicals that initiate a cascade of reactions leading to the formation of fibrin threads, which trap red blood cells and form a stable clot, stopping the bleeding.

Other Options:

•  Red blood cells: Red blood cells are primarily responsible for oxygen transport and do not play a direct role in blood coagulation.
•  Blood plasma: Plasma contains clotting factors, but it is the platelets that actively participate in the clotting process.
•  White blood cells: White blood cells are involved in immune responses, not in blood coagulation.