Could you elaborate on "distributes it's functions"?

Wordpress loads through a central index.php file that steps through a series of files which handle everything from installation to defining configuration settings. A boiled down walk through the process would look something like this; Page Accessed >> Load Config >> Include Includes >> i18n >> Plugins >> Controller >> View with of course a million minor intricacies going on at each of those stages. I realize this answer is a little vague, but the question is as well. ;)