Clinical Medical Assistant Certification Exam Practice Question

Correct Answer: D

Rationale: Thrombocytes, or platelets, are crucial for coagulation as they aggregate at injury sites, forming a temporary plug and releasing factors that initiate the clotting cascade. Eosinophils primarily combat parasitic infections and are involved in allergic responses, making them irrelevant to coagulation. Lymphocytes are key players in the immune response, focusing on recognizing pathogens rather than clot formation. Monocytes, while important for immune defense and tissue repair, do not directly participate in the coagulation process. Thus, thrombocytes are the only cellular elements essential to coagulation.