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With stunning footage and cutting-edge technology, National Geographic explores the human body from the inside out as never before.

In four classic programs, we'll look how our incredible human machine works-from the miraculous in-utero development of a fetus to the mechanics of a beating heart, and from the formation of skin to the amazing way our complicated systems work together for sensing, adapting, reproducing, regenerating, and thinking.

Programs include How to Build a Beating Heart, Skin, In the Womb, and Incredible Human Machine.

This is a multiple-item set. We have not yet added the individual components.

Set is not rated. Films may be rated individually.

Released by Universal Music Group. See more credits.