Request Uri handling in Multi Module Application

Beginner to phalcon framework... I followed framework documentation of phalcon to create an sample project which is having multi module file structure. Where it contained module based "views" folder like below.

• phalco-test
  • application
    • config
      • modules.config.php
  • module
    • register
      • controllers
      • models
      • views
      • Module.php
    • default
      • controllers
      • models
      • views
      • Module.php
  • public
    • .htaccess
    • index.php

Able to setup and run the application, my query is, in documentation the application handling method doesn't contain request uri as parameter

echo $application->handle()->getContent();

If we won't pass the request uri, like below

$requestUri = str_replace( $_SERVER["SCRIPT_NAME"], '', $_SERVER["REQUEST_URI"]); echo $application->handle($requestUri)->getContent();

always it will go to default controller action.. Did i missed anything or we need pass uri to work with different routes? how does it work?