The human body is an extraordinary machine. It allows us to breathe, feed, run, think, interact with others...and much, much more! Every small part of our body is a true microcosm. But what are our organs made of? Why does the heart beat?

The human body is an extraordinary machine. It allows us to breathe, feed, run, think, interact with others...and much, much more! Every small part of our body is a true microcosm. But what are our organs made of? Why does the heart beat?

The human body is an extraordinary machine. It allows us to breathe, feed, run, think, interact with others...and much, much more! Every small part of our body is a true microcosm. But what are our organs made of? Why does the heart beat?