Intestine

The intestine is an internal organ that is part of the gastrointestinal tract. The intestine contains two segments, the large intestine and small intestine. The large intestine follows the small intestine. The small intestine is responsible for the absorption of the products of digestion. The endothelial lining of the small intestine is covered in finger like projections called microvilli, these increase the surface area for absorption. 

Your small intestine is the longest part of your digestive system. It has three areas called the duodenum, the ileum, and the jejunum^[1].

References

1. ↑ https://www.nlm.nih.gov/medlineplus/smallintestinedisorders.html