This week, the No. 1 bestselling app on the iPhone app store, and the No. 2 app on the Google Play store, is Human Anatomy Atlas 2018 ... Regions. Head/neck, abdomen, pelvis, knee, etc.

This integration, says Daniel Lieberman in The Evolution of the Human Head, his thorough review of the head's anatomy and development ... hafted to the front of both. Each influences the others ...