Final answer:
Platelets are small cell fragments that are important in blood clotting, adhering to injured areas and forming a clot. A low platelet count could contribute to the development of an arterial clot.
Step-by-step explanation:
Platelets are small cell fragments that play a crucial role in blood clotting. When a blood vessel is injured, platelets adhere to the injured area and release clotting factors, which form a web of proteins to catch red blood cells and create a clot. Platelets have a lifespan of ten days before being removed by the liver and spleen. In the patient's case, a post-operative arterial clot has developed, which means that there is an abnormal clot in one of the patient's arteries. The low platelet count could be a contributing factor to the development of the clot.