This lengthy piece can be viewed in a larger format on Google Docs with the following link. I recommend that, but also if you are wanting a more modest version or kid-friendly version, use the Part One tab on the post for that. A link to Part Two will be on a separate post.
Part One Text
https://docs.google.com/document/d/1Dp_5f_Owv4HZJDcpbKDr2X-yzfhWm3c8482n...
Do not use this to teach per se, but as a general guide with many of my own insights added to put a greater appreciation alongside the physical body and functions.