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 â www.usps.com Track USPS. United States Postal Service (USPS) is a state-owned Postal company of the United States federal government which helps in providing US mail and US postal tracking. USPS is currently equipped with more than 600,000 thousand employees and over 200,000 Vehicles.