Does unloadMovie clean out player memory?

I am building a website that has a separate .swf for each page of the site. Each page is loaded into shell_mc using loadMovie. When a new page loads, I run shell_mc.unloadMovie before calling shell_mc.loadMovie(newPage). I am just wondering if the unloadMovie command will destroy everything in the current page that might take up memory before it begins loading a new page. Thanks for any input!