When the immune system attacks itself.
So when you are communicating in a healthcare facility something isn't loss in translation and something serious occurs because someone didn't know the proper terminology.
You would definitely underweight. The villi in your small intestines increase intestinal absorptive surface area approximately 30-fold and 600-fold respectively. This provides exceptionally efficient absorption of nutrients in the lumen. This increases the surface area for food to be absorbed. So if there were to be less villi you would underweight.
