How is the small intestine adapted for absorbing products of digestion?

The small intestine is adapted for absorbing products of digestion because: it is 5 meters long so it provides a large surface area for the absorption of molecules produced by digestion, its covered with millions of villi which increase the surface area for absorption and the microvilli further increase the surface area. Villi also have good blood supply so the bloodstream rapidly removed the products of digestion which increase the concentration gradient, and they have a thin membrane which ensures a short diffusion path