There are lots of wonders of nature that match fluid motion like the horns of the african kudu antelope matching water vortexes. I'm not claiming that they are unexplainable without God or something though.
Please note that after checking all the references out in my book to bones, I do not claim that they show anything path-forcing about understanding nature but at least they are interesting.
On pg. 24 of Sensitive Chaos there is a diagram of a bone that says "Spiraling surfaces can be found in the structure of many bones; human humerus." OK I get a tumbleweed for that one.
This one on pg. 26 is pretty good. It has a picture of a bone and says, "The 'lines of flow' on the surface of the bone can be followed right into the interior, where they end in the spongy bone structures. Human femur (after J. Wolff). After the caption it says, "In the quiestcent, finished forms of vessels, muscles, ligaments, sinews and bones the same flowing movement can be detected which brings these organs to their varying degrees of density and solidification in such a way that finally in each single organ the underlying spiraling process remains clearly recognizable. And do we not see this flowing movement - in rhythmic sequence - even in the great variety of movements of human limbs?..." OK it doesn't quite say what I wanted.
I'm pretty sure pg. 53 is the one we want, but it is about trees, so we are forced to consider whether these perforations can form while the tree is growing somehow, like annular rings, and that is where my argument might unravel, I don't know, but make your own decision.
The figure is a "Spongy bone structure in the human hip joint."
"The shapes to be seen in the bark and grain of many kinds of wood are like solidified images of turbulent currents in water (Plates 34, 36, 38). Not that the actual movement of the liquids in the wood is turbulent; rather it is as though these formations were the mark left by the invisible streaming of currents and forces in the trees. Plate 34 shows the arrangement of knots in the trunk of a cypress tree. Plate 38 shows the trunk of a mountain oak, and Plate 36 the grain in the trunk of an olive tree." That's all I've got, as it turns out.