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.
Service number: 1-800-275-8777 Domestic & International USPS Tracking: 1-800-222-1811. 9400 1000 0000 0000 0000 00 0300 0000 0000 0000 0000 9407 3000 0000 0000 0000 00 82 000 000 00 There are also some other less used tracking number formats.