Platelets, also called thrombocytes (thromb- + -cyte, blood clot cell), are a component of blood whose function (along with the coagulation factors) is to stop bleeding by clumping and clotting blood vessel injuries.
Milk of the poppy is essentially the Westeros version of morphine. Maesters make it from crushed poppy flowers, and morphine and other opiate-based drugs are made from poppy plants. Indeed, the books' descriptions strongly suggest that the poppy is intended to be the real-world opium poppy (Papaver somniferum).
Poppy chose her mother's maiden name, Montgomery, as her stage name. Arrived in Hollywood at age 18 carrying a copy of How to Make It In Hollywood. Enjoys board games, horseback riding, photography, snowboarding, traveling and yoga. Her mother, Nicola, is a market researcher and father, Phil, a restaurateur.