Justin Bieber was born March 1, 1994 and grew up in Stratford, Ontario, Canada. Justin Bieber is 23 years old. At the age of 12 he entered a local singing competition against others who had significantly more experience and the benefit of vocal coaches. Justin Bieber came in second place singing Ne-Yo's So Sick..
Platelet. An irregularly shaped cell-like particle in the blood that is an important part of blood clotting. Platelets are activated when an injury causes a blood vessel to break. They change shape from round to spiny, sticking to the broken vessel wall and to each other to begin the clotting process.
Dr. StÃ¶ppler's Response: Platelets are the smallest cell-like structures in the bloodand are important for blood clotting and plugging damaged blood vessels. Platelet countsare usually done by laboratory machines that also count other blood elements such as the white and red cells.