This is a picture of the small intestines and the mesentery. The role of the small intestines in the pig is to absorb nutrients into the body to help the body grow. The duodenum is the part of the small intestines that connects the small intestines and the stomach. When the food leaves the stomach, it passes through the duodenum first and then enters the jejuno- ileum, the second part of the small intestines. Nutrients are absorbed in this part of the small intestines through villi and microvilli. Villi and microvilli are small fingerlike projections that increase surface area of absorption of nutrients.
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