While it is nice to see some of the human targets with key anatomy added in so as to give the shooter and idea of where to shoot (straight on) to be able to hit said key anatomy, so it is shame that the anatomy isn't as accurate as it could easily be.
For example, ANT-4 and ANT-5 both have the lungs extended up to and maybe slightly above where the person's collarbones would be. So the lungs and heart are shown with a higher than actual location. ANT-8 has the heart and lungs about right in terms of height, but they have skinnified the skeleton so the skeleton is actually too narrown for the person in the image. The frontal view anatonomy overprinted on the person also doesn't fit, apparently because the guy's body isn't quit full front, I think. There is more room on the right side of the pelvis than the left. Ant-5 and ANT-8 both have pelves that are far too narrow. It looks like they have well in excess of 1" of tissue between the iliac crests and the edges of their bodies. It actually is closer to 2" or so, but we can account for clothing being part of the problem. Even so, neither of these guys would be able to reach down and thump on their illiac crests, even though they are both not fat.
RyanM said,
If you nail the spinal cord, even if the bullet went through the stomach first, chances are good of an instant stop.
This is one of those statements that seems specific, but it isn't. What is an instant stop? Spinal injuries below the neck may result in the guy losing control of his lower body and his normal locomotion may be stopped, but that does not mean he will be stopped as a fighter and if he is still armed then he still can physically shoot you. He just isn't going to run away on his legs.
As far as differences of COM versus COC (center of chest/heart area), COC gives you the best shooting area for hitting vital organs, but gives you less room for error to account for your shooting problems, moving target, etc. COM gives you the greatest room for error while still striking the target.