Along the lines of what Eric suggested, you can put inline calls to src-blocks in the text. Here are some ways you could get something like what you describe I think.

* text to be included                                              :noexport:

#+name: block-1
#+BEGIN_SRC python :results value :var a="a" b="b"
return f"<<{a} {b} c>>"
#+END_SRC

#+name: lorem
#+BEGIN_EXAMPLE
Aliquam erat volutpat.  Nunc eleifend leo vitae magna.  In id erat non orci commodo lobortis.  Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus.  Sed diam.  Praesent fermentum tempor tellus.  Nullam tempus.  Mauris ac felis vel velit tristique imperdiet.  Donec at pede.  Etiam vel neque nec dui dignissim bibendum.  Vivamus id enim.  Phasellus neque orci, porta a, aliquet quis, semper a, massa.  Phasellus purus.  Pellentesque tristique imperdiet tortor.  Nam euismod tellus id erat.
#+END_EXAMPLE

#+name: lorem-2
#+BEGIN_EXAMPLE
Pellentesque dapibus suscipit ligula.  
#+END_EXAMPLE


#+name: block-2
#+BEGIN_SRC sh :results output :var content=lorem
echo $content
#+END_SRC


* blog post 1

twinkle star call_block-1() {{{results(=<<a b c>>=)}}}

Later call_block-1(a=1) {{{results(=<<1 b c>>=)}}}

or call_block-1(a=5, b=7) {{{results(=<<5 7 c>>=)}}}


call_block-2(lorem) {{{results(=Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa\, cursus ut\, gravida ut\, lobortis eget\, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci\, porta a\, aliquet quis\, semper a\, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.=)}}}

call_block-2(lorem-2) {{{results(=Pellentesque dapibus suscipit ligula.=)}}}