The small intestine takes in nearly all your nutrients. So it builds a huge surface with three levels of folding. Tap each level and each part of a villus.
Circular folds
Small intestinesurface area = absorption
The structures
Together, folds × villi × microvilli make the surface about 600 times bigger. That is roughly the size of a tennis court.
📷 Reference image
A real labeled figure to compare with the interactive above.
Small Intestine Villi — OpenStax, CC BY 3.0 (via Wikimedia Commons)
