Question

Most of the absorption of the products of digestion takes place in humans across the

• A. smooth wall of the large intestine
• B. fingerlike villi of the small intestine
• C. convoluted walls of the stomach
• D. squamous epithelium of the oesophagus

Answer 1

Answer: (B)

fingerlike villi of the small intestine

• The innermost layer lining the lumen of the alimentary canal is the mucosa. This layer forms irregular folds (rugae) in the stomach and small finger-like foldings called villi in the small intestine.
• The cells lining the villi produce numerous microscopic projections called microvilli giving a brush border appearance. These modifications increase the surface area enormously.
• Villi are supplied with a network of capillaries and a large lymph vessel called the lacteal. Hence, Most of the absorption of the products of digestion takes place in humans across the fingerlike villi of the small intestine
  

So, the correct answer is 'fingerlike villi of the small intestine'.