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.
What is the 1-800 number for USPS? Below is a list of toll free 800 numbers for United States Postal Service. Customer Service: 1-800-275-8777 (1-800-ASK-USPS) hours:M-F â 8:00 am â 8:30 pm ET;Sat â 8:00 am â 6:00 pm ET;Sun/Holidays â Closed. Thank you for calling the US postal service, in a few words tell me how I can help you today, you can say things like, priority mail, prices or stamps for example.