Adding WP to part of a web page

Hi, I have WP installed and under a link named ‘Blog”‘ on my website. I want to add a “Comments” section to a different web page, but it is outside of my Blog page in a regular HTML page. Is this possible?

Could I somehow add the body.php to just the body of my HTML page so that people could post comments on my web page. Failing this how would I add WP to just part of a web page?

Thanks