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 TrackingÂ® Domestic & International USPS TrackingÂ® 1-800-222-1811 To see the most recent status of your packages, enter your tracking number in any search box on USPS.com. NOTE: The tracking information available to customer service representatives is the same information you will see on USPS Tracking. Hours of Operation