So you know how animals work! Excellent. Please build me a machine that does the same, to demonstrate your understanding.

It can be slow and inefficient to make up for lack of equivalent materials and mechanisms. A simulated one will do.

Or just explain how it works. I've been looking forward to reading that book. You'd sell some copies.

Also, a nitpick: it's a few millennia of studies by now. For example you can read Aristotle on the topic from 1700+ years ago.