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.
Retail USPS Tracking: USPS sells retail tracking at its post offices. Just fill out PS Form 152, which is a bright green label that is available at the customer desk. You can check the status of your item by entering a code online at USPSâs Track and Confirm page or by calling a number on the form.