What is the final section of the small intestine that connects the jejunum and large intestine called?

The final section of the small intestine that connects the jejunum to the large intestine is known as the ileum. This part plays a critical role in the digestive process, particularly in the absorption of nutrients and bile salts, which are essential for digestion. The ileum is well adapted for nutrient absorption due to its extensive surface area, which is provided by villi and microvilli.

In human anatomy, the small intestine consists of three parts: the duodenum, jejunum, and ileum. The duodenum is the first part, where the majority of chemical digestion occurs. The jejunum follows, primarily involved in the absorption of carbohydrates and proteins. Finally, the ileum absorbs vitamin B12 and any remaining nutrients before passing the undigested material to the large intestine. This sequential structure highlights the specialization of each section in the digestive process and emphasizes the ileum's important role as the final segment of the small intestine before the large intestine.