I recently saw an exhibit called "Bodies Revealed", (which has been quite controversial), where actual humans bodies are disected into different masses. Some are just muscle, some are just veins. These photos remind me of the "branches" in the lungs that deliver the air into your blood. They also had an exhibit on nerves, and those were a lot like branches too. I'm constantly fascinated with the similarities that things in nature share with eachother.
Here's a tree that I found during this photo shoot.
I love how the photographer is the one who decides on the "truth".