A cell that carries out the final response or function of a particular process. The main effector cells of the immune system, for example, are activated lymphocytes and phagocytesâthe cells involved in destroying pathogens and removing them from the body.
Best Answer: Yes you can track it online here: https://tools.usps.com/go/TrackConfirmAc... The tracking number should look like this: CP 000 000 000 US. You can find it on the receipt, and the customs form you filled out.
Also, you can make full use of the number format to make sure you enjoy the service you paid for. The following information will show you the tracking number format of USPS. Certified Mail:-7000 0000 0000 0000 0000 and 9407 1000 0000 0000 0000 00. Global Express Guaranteed:-82 000 000 00. Priority Mail Express International:-EC 000 000 000 US.