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.
1 Navigate to the USPS claims login. Sign in with your USPS.com account information or register for a new account.  Enter your shipment's article number. If you don't see an article number in that format, look for a string of 20, 22, 26, 30 or 34 numbers.