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.
Villi are specialised for absorption in the small intestine as they have a thin wall, about one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.