absorption in villi

Question 1

how are villi adapted for absorbtion

Answer 1

• large surface area, due to folding, diffusion/absorbtion increased
• thin walls, just one cell thick, decrease diffusion difference
• good blood supply, network of capillaries, blood vessels, maintain high concentration gradient

Question 2

what is coeliac disease

Answer 2

-result in villi which are flattened or fewer.
-hard to gain weight
-don’t uptake all useful nutrients