My Question on LinkedIn

Can anyone guide me as to how I could include "Add Comments" option on my blog?

I have recently set up My Blog page on my website by using the blog option offered by my web host. This page does not have the option to "Post Comments / Reviews". I would like to add a HTML code to give an option to the viewers to post their comments. Can anyone tell me whether any free service is available to include "Post Comments" facility on my Blog page or a free HTML code to use on my blog page at the end to provide posting facility. I request you to guide me after your going through my blog at http://www.suryanarayana.com/blog.html
Please reply to my email id info@suryanarayana.com or answer on http://www.linkedin.com/in/suryanarayana