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.
USPS Tracking By Tracking Number. www.USPS.com. USPS Tracking by Tracking Number United States Postal service which is also known as USPS was established on July 1st, 1971 in Washington, D.C., U.S. USPS is an independent agency of United States government which is responsible for providing of Postal Services all over the United States.