What type of cells in the small intestine are responsible for the absorption of nutrients?

The absorptive cells in the small intestine, also known as enterocytes, are specifically designed for the absorption of nutrients. These cells line the interior of the small intestine and have microvilli on their surface, which significantly increases the surface area available for absorption. This adaptation allows them to effectively take in essential nutrients such as carbohydrates, proteins, fats, vitamins, and minerals from the digested food as it passes through the intestinal lumen.

Goblet cells, while present in the small intestine, primarily secrete mucus to lubricate the intestinal lining rather than absorb nutrients. Smooth muscle cells are involved in the peristaltic movements that help push food through the digestive tract but do not play a direct role in absorption. Crypt cells, found in the intestinal crypts, are mainly involved in the secretion of intestinal juices and the renewal of epithelial cells but also lack the function of absorbing nutrients. Thus, absorptive cells are crucial for nutrient uptake in the small intestine.