Question

What is villi ? write in detail?​

Answer 1

Answer:

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Answer 2

Villus, plural villi, in anatomy any of the small, slender, vascular projections that increase the surface area of a membrane. Important villous membranes include the placenta and the mucous-membrane coating of the small intestine. The villi of the small intestine project into the intestinal cavity, greatly increasing the surface area for food absorption and adding digestive secretions. The villi number about 10 to 40 per square millimetre (6,000 to 25,000 per square inch) of tissue. They are most prevalent at the beginning of the small intestine and diminish in number toward the end of the tract. They range in length from about 0.5 to 1 mm (about 0.02 to 0.04 inch).