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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.
Define absorption, digestion, elimination, and segmentation. Absorption=Process of taking these products through the intestinal wall. Digestion=Large food molecules are broken down to smaller molecules, mechanically and chemically. Elimination=Undigested portions of food and waste products are removed from the body.