How is Django internally implemented and how does it handle requests?

Django is a web framework in Python that handles HTTP requests through a chain of components.

1. URL routing: When a request comes in, Django looks at the URL and matches it with patterns in the urls.py file to determine which view (handler) should process it.

2. Middleware: The request passes through a chain of middleware — classes that can modify the request or response, for example, for authentication, sessions, caching.

3. View: After middleware, a view function or class is called, which contains the logic for processing the request, such as fetching data from the database, forming a response.

4. Templates: If needed, the view renders HTML using templates.

5. Response: The formed HTTP response is returned to the client.

Inside Django, there is an ORM for database interaction, a template system, and many built-in components that simplify web application development.