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.
Send Certified Mail from Your Post Office. Visit a local post office and obtain a Certified Mail Form 3800. This form contains a green and white sticker that includes a barcode, which will allow you to track your mail through the USPS.