Before the fish was the tunicate—the marine invertebrate. The inner layer of the tunicate is a tube that moves water (and nutrients) in...

One thing Jon Zahourek routinely emphasizes is that a model of human anatomy is always close at hand. Yourself. It’s always there as a...

Hang around here long enough and you’re going to hear one word quite a bit. System. In this clip from 1992, Anatomy in Clay® Learning...

“How many legs on a horse?” It’s a question Jon Zahourek asks when he wants students to ponder the many remarkable things about...