Here's why:

* Megakaryocytes are large, multi-nucleated cells found in the bone marrow. They are responsible for producing platelets.

* Platelets are not actual cells, but rather small, irregularly shaped cell fragments that break off from megakaryocytes.

* Platelets play a crucial role in blood clotting, preventing excessive bleeding.

So, while platelets are not cells themselves, they originate from a specific type of cell, the megakaryocyte.