which organ does the absorption of nutrients occur
The small intestine is the main area of the GI tract for absorption. The small intestine has three separate sections, the duodenum, jejunum and ileum. The majority of nutrient absorption occurs in the duodenum and jejunum.The duodenum absorbs carbohydrates, proteins, and minerals including calcium, magnesium, iron, chloride, sodium and zinc.he small intestine has three separate sections, the duodenum, jejunum and ileum. The majority of nutrient absorption occurs in the duodenum and jejunum. The duodenum absorbs carbohydrates, proteins, and minerals including calcium, magnesium, iron, chloride, sodium and zinc.