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The small intestine is a long, highly convoluted tube in the digestive system that absorbs about 90% of the nutrients from the food we eat. It is given the name âsmall intestineâ because it is only 1 inch in diameter, making it less than half the diameter of the large intestine.
The primary organ of digestion and absorption of nutrients is the small intestine, especially the duodenum. In general, you could say the stomach breaks down the food, the s â¦ mall intestine digests and absorbs the food, and the large intestine absorbs water. 4 people found this useful.