Platelets are minute discs between 1 to 4 micrometers in diameter that are formed in the bone marrow from megakaryocytes, which are extremely large hematopoietic cells found in the bone marrow. Platelets play a key role in hemostasis and thrombosis. Several references are cited regarding platelet formation and function.

3. Guyton,2006
Platelets (also called thrombocytes) are minute discs 1 to 4
micrometers in diameter. They are formed in the bone marrow
from megakaryocytes, which are extremely large cells of the
hematopoietic series in the marrow

4. Ganong,2010 , Guyton,2006 and Modern Biology,2006

5. Guyton,2006 & Modern Biology,2006

6. Modern Biology,2006

7. Anjali,2008

8. Ganong,2010

9. Heddwen.atl.,2010

10. Modern Biology,2006

11. Modern Biology,2006

12. Anjali,2008

14. i. John H. Postlethwait and Janet L. Hopson ; 2006, Modern Biology.
ii. Arthur C. Guyton. and John E. Hall;2006, Guyton.
iii. Anjali A. Sharathkumar; APRIL 2008, Platelet Function Disorders.
iv. Heddwen L. Brooks, Scott Boitano, Susan M. Barman and Kim E. Barrett;2010,Ganong's Review of Medical Physiology, Twenty-Third Edition.
Emma C. Josefsson, Deborah L. Burnett, Marion Lebois, Marlyse A. Debrincat, Michael J. White, Katya J. Henley, Rachael M. Lane, Diane Moujalled,
Simon P. Preston, Lorraine A. O’Reilly, Marc Pellegrini, Donald Metcalf,Andreas Strasser & Benjamin T. Kile; 17 march 2014, Platelet production
proceeds independently of the intrinsic and extrinsic apoptosis pathways.