A) villi
B) sub-tentacular cells
C) sub-mucosa
D) gastric glands
Correct Answer: A
Solution :
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 villi increase the surface area for absorption of food materials.
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