Reddit mentions of My First Human Body Book

Anatomy and physiology. I'm not talking about med school level stuff, but enough basic understanding of how the body works to know why it's important to eat healthy food and not junk, to drink water, to exercise, to get proper sleep every day - the things we as parents try to get them into, but that they eventually need to enforce by themselves. I can't go a day without discussing the importance of proper chewing, for example, a few times at least - then you get into digestion in general too. My child is 3 years old, and it's not lost on her. She loves talking about the journey food takes from the mouth, through the digestive tract, and out her bum.

We've recently gotten her a human anatomy colouring book, and there's lots of fun stuff in there for her to explore and ask questions about: https://www.amazon.com/My-First-Human-Body-Book/dp/0486468216/ref=sr_1_2?ie=UTF8&qid=1492867906&sr=8-2&keywords=dover+anatomy+coloring+book

Why should we watch out never to hit our head? Why do we bleed when we get cut, and what is blood for? What's that thumping noise in our chest? And once they start learning how it all works, it's much easier also to explain what death is - when the body stops working, whether due to disease or accident. They need to be taught early to reason from cause to effect in their habits of life and their well-being. Even before first grade, I'd say.

Why on earth would we start to teach children about outer space and geography and reading and writing, before they can even understand their own bodies and how to take care of them?