by Friedrich Miescher Institute for Biomedical Research The gut lining has a brushlike appearance characterized by microscopic pits called crypts and tiny protrusions called villi. Villi contain enterocytes, a type of cell whose main function is to absorb nutrients from food. Credit: BallenaBlanca/Wikimedia Commons, published under a Creative Commons Attribution-Share Alike 4.0 International license (CC BY-SA...
