Final answer:
Primary thrombocytosis is characterized by an increased number of platelets, which can lead to thrombosis. Platelets, also known as thrombocytes, are crucial for blood clotting. An abnormally high or low number of platelets can lead to serious health issues.
Step-by-step explanation:
Primary thrombocytosis, also known as Essential thrombocytosis, is an increase of c) Platelets. Thrombocytes, more accurately called platelets, are cell fragments essential for blood clotting. When there is an abnormally high number of platelets present, like in thrombocytosis, it can lead to the formation of unwanted blood clots, a condition known as thrombosis. Conversely, a low number of platelets, termed thrombocytopenia, can result in improper blood clotting and excessive bleeding.