plateletleri

Platelets, also known as thrombocytes, are tiny, irregular-shaped cell fragments that circulate in the blood. They are crucial components of the hemostatic system, playing a vital role in blood clotting and wound healing. Platelets are produced in the bone marrow from large cells called megakaryocytes. Unlike other blood cells, platelets lack a nucleus, which allows them to be more numerous and flexible, enabling them to squeeze through narrow blood vessels.

When a blood vessel is injured, platelets are activated. They adhere to the site of injury, aggregate together to form a plug, and release various factors that promote blood coagulation. This process, known as hemostasis, stops bleeding and prevents excessive blood loss. Platelets also contribute to the inflammatory response and the repair of damaged tissues.

The normal platelet count in adults ranges from 150,000 to 450,000 platelets per microliter of blood. A low platelet count, known as thrombocytopenia, can result from various conditions such as autoimmune disorders, infections, or certain medications, leading to an increased risk of bleeding. Conversely, a high platelet count, or thrombocytosis, can be a sign of inflammation, infection, or certain types of cancer, and may increase the risk of blood clots.