smáþarmanna

Smáþarmanna is the Icelandic word for small intestine. The small intestine is a long, coiled tube in the digestive system responsible for absorbing nutrients from food. It follows the stomach and precedes the large intestine. Its structure is characterized by a highly folded inner lining, which increases its surface area for efficient absorption. These folds are covered in villi, finger-like projections, and even smaller microvilli, further maximizing the area available for nutrient uptake. The small intestine is divided into three main sections: the duodenum, the jejunum, and the ileum. Digestion continues in the duodenum with the help of enzymes from the pancreas and bile from the liver. The jejunum is the primary site for the absorption of most nutrients, including carbohydrates, proteins, and fats. The ileum absorbs vitamin B12, bile salts, and any remaining nutrients. Peristalsis, the muscular contractions of the intestinal walls, propels the digested food through the small intestine.