Augment biology is a series of minor to moderate miracles gifted to humanity by the !Quell. The bodies still look human, and still have a humanlike structure with bones and muscles and organs in all the right places, but their DNA-analogue is more !Quell in nature.
The bodies have great ability to regenerate, are easy to adjust, and are unaging - better in some ways than a baseline human body. They would not be as strong and fast as baseline human bodies without their implants. But the implants are as much a part of augment bodies as a human's skin or stomach. There are implants to strengthen the muscles, monitor the heart, to fight pathogens. Dozens of kinds of implants that turn augment bodies into a finely toned miracle machine.
The source of powers are special implants all over the body that can create and manipulate Klein fields. These incredibly capable little devices are capable of telekinesis, force absorbing and releasing, and a few other things, all controlled consciously and subconsciously (with some help from other implants).
But Klein emitters need the help of a mysterious organ called the Core. It sits just behind the heart, and the !Quell have not revealed much about how exactly it works... But will, in time, when humanity is ready to learn the secrets of the science.