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.
Package senders will find the USPS tracking number either on the label or receipt, depending on the mail class selected. The USPS website has example number formats for trackable mail types including Certified Mail, Priority Mail and Registered Mail.isit the USPS Tracking website. Enter the tracking number manually or using the cut and paste functions on the computer. Click the Find button and wait for the tracking screen to load.