What is the purpose of intestinal villi?

• A. Goblet cells
• B. Increasing surface area to absorb more nutrients
• C. Duodenum
• D. Ileocecal valve

Answer: (B)

Intestinal villi are tiny fingerlike projections lining the mucosa of the small intestine that dramatically increase the surface area available for absorption. This expanded surface, together with the even smaller microvilli on the absorptive cells, allows nutrients, electrolytes, and fluids to be absorbed more efficiently as chyme moves through the small intestine. In ostomy care, it's the small intestine where most absorption occurs, so the villi play a key role in how much nutrition and hydration are taken up before contents reach the stoma. Goblet cells produce mucus for lubrication, which helps protect and moisten the lining but is not the primary purpose of the villi. The duodenum is simply the first section of the small intestine, not the function of the villi themselves. The ileocecal valve regulates flow between the ileum and the colon, but again, it’s not what villi are for. So, the main purpose of intestinal villi is to increase surface area to absorb more nutrients.