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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 two processes that occur are digestion and absorption. Digestion is the process by which your body breaks down food into small nutrient chemicals.While absorption is the process in which when the small nutrient molecules go through a wall of the digestive system and into the blood.ile is then released from the gall bladder and enters the small intestine via the bile duct to aid in the digestion of fats into glycerol and fatty acids.