A term to describe those people is obese
The liver digests food by producing bile to break down fats, removing toxins and breaking down and storing some vitamins and minerals. The pancreas produces enzymes to help break down proteins, fats and carbohydrates.
-
I’m sorry if this isn’t what you’re looking for, if it isn’t just comment and i’ll see if i can help.
The one that would explain the evolution of that species is sm