My theory on how certain religous groups knew about the human anatomy…?
I’m a Yupik Eskimo. Full blooded and from rural Alaska. In our culture, we know the fetus develops in steps, knew about body parts(liver, kidneys, brains, etc.). I asked how did they know this and an elder told me that our ancestors probably disected the dead in order to better know about the humab body. In my theory, they did this when someone died of unknown causes. Either that or plain curiosity.