It causes premature ageing of the skin by a process called glycation. This is where excess sugar in the blood attaches itself to lipids, nucleic acids and proteins (especially your collagen) to form âadvanced glycation end Â­productsâ or AGEs, which accelerate the ageing process and so cause wrinkly skin.
What is the role of villi in digestive system? the role of the villi is that it increases the surface area so that when food passes through the small intestine the food will get caught on the villi and the nutrients are ab â¦ sorbed into the blood.
The small intestine is 5â6m in length, and most of the chemical digestion occurs within the first metre. Once digested into smaller molecules, absorption can take place.Millions of tiny finger-like structures called villi project inwards from the lining of the small intestine.These structures greatly increase the surface area of contact that the products of digestion have with the small intestine, allowing for their rapid absorption into the bloodstream.illions of tiny finger-like structures called villi project inwards from the lining of the small intestine. These structures greatly increase the surface area of contact that the products of digestion have with the small intestine, allowing for their rapid absorption into the bloodstream.