A platelet is a tiny, disc-shaped cell fragment found in our blood. These small components play a crucial role in the body's ability to stop bleeding. When a blood vessel is injured, platelets quickly gather at the site and stick together to form a plug, which helps seal the wound. This process is essential for healing and prevents excessive blood loss. In addition to their role in clotting, platelets also release chemicals that promote healing and attract other cells to the injury site. They are produced in the bone marrow from larger cells called megakaryocytes. Without enough platelets, a person may experience prolonged bleeding or bruising.