This is an image of a frozen-hydrated rat liver mitochondrion based on work done at the Wadsworth Center's Resource for Visualization of Biological Complexity (<a rel="nofollow" class="external free" href="http://www.wadsworth.org/databank/electron/cryomito_dis2.html">http://www.wadsworth.org/databank/electron/cryomito_dis2.html</a>).  It has not been previously published and I am releasing it into public domain for this article.  The point is that the cristae are not folds of the inner membrane of the mitochondrion but pleomorphic invaginations with narrow tubular connections to each other and to the peripheral region of the inner membrane.  I can advise on how to change your cartoon to be more accurate, while still retaining the basic format.  There are numerous published references in last 10 years, the most recent: C.A. Mannella (2006) Biophysica et Biochimica Acta 1762: 140-147
Original uploader was Carmmann (<a href="https://en.wikipedia.org/wiki/User_talk:Carmmann" class="extiw" title="en:User talk:Carmmann">talk</a>) at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons by <a href="//commons.wikimedia.org/wiki/User:Gustavocarra" title="User:Gustavocarra">Gustavocarra</a>.