Quote from a Jedi spokesperson:
Midichlorians? What? Do you mean “mitochondria”? Because most living things have mitochondria, especially anything more complex than bacteria or other single-celled life forms, and the mitochondria are sort of the “batteries” of the cell. So kind of yes, those are where a lot of the energy of life exists, and if you want to know more then I am happy to introduce you to a very nicematron. But mitochondria exist in neither greater nor lesser amounts within Force users compared to those not as sensitive to the Force.
Origin & Source
Originally from an excellent young people's story, A Wind in the Door by Madeleine L'Engle, shamelessly co-opted by the script writers of Jedi Quest and used without credit or permission.