Transparent People

During one of our yoga classes, our instructor announced that she was going to show us the diaphragm. While we were still exercising, I kept wondering whether the instructor herself might be transparent if she was planning to show us her diaphragm.
It later turned out that she only wanted to show us an animation on her phone explaining how the diaphragm works.
In Lifespan by David Sinclair, I read that transparent jellyfish are capable of regenerating their organs. The challenge now is to discover what allows their cells to renew themselves. Once we understand that, perhaps those properties could be copied in humans as well.
But then maybe we’d end up with organs as transparent as jellyfish, and yoga instructors would really be able to demonstrate how the diaphragm is supposed to work... :-)