Dear Prof.,

Blood clots form when a blood vessel is damaged. A type of prostaglandin called thromboxane stimulates constriction and clotting of platelets. Conversely, PGI2, is produced to have the opposite effect on the walls of blood vessels where clots should not be forming.

http://chemistry.elmhurst.edu/vchembook/555prostagland.html

Best regards

SM Najim

prostaglandins are precursors of many platelet factors responsible for regulation of platelet aggregation and platelet adhesion so related to platelets mainly