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.
Track USPS Priority Mail Int'l package with customs number? I just sent out a package to South Korea, it is a Christmas present for a friend. I sent it out Priority Mail which I didnt even think to ask about tracking. Anyway I noticed there was a Customs Form number both on the sales reciept and on a copy of the customs form i filled out.