Final answer:
Thrombocytes or platelets are cells derived from megakaryocytes in the bone marrow that play a crucial role in blood clotting. They stimulate the conversion of fibrinogen into fibrin, promoting the formation of a blood clot to prevent blood loss and enable wound healing.
Step-by-step explanation:
Thrombocytes, also known as platelets, are cells that participate in the process of blood coagulation, or clotting. These small disc-shaped cell fragments, measuring 2-4µm in diameter, are produced in the bone marrow from larger cells known as megakaryocytes. Upon a blood vessel's injury, thrombocytes are attracted to the site, where they adhere by forming numerous projections and releasing contents that activate other platelets and coagulation factors. This cascading reaction induces the conversion of fibrinogen, a water-soluble protein present in blood serum, into fibrin (a non-water-soluble protein), consequently leading to the formation of a blood clot or platelet plug. This clot prevents further blood loss and encourages wound healing. So, the answer to your question is D. Thrombocytes are cells that form a blood clot.
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