Final answer:
The absorption of vitamins and minerals begins in the duodenum. Iron is absorbed in the duodenum. Vitamin B12 and bile salts are absorbed in the ileum. Water and lipids are absorbed throughout the small intestine, including the duodenum and ileum in addition to the jejunum.
Step-by-step explanation:
The absorption of vitamins and minerals begins in the duodenum.
Iron is absorbed in the duodenum. Vitamin B12 and bile salts are absorbed in the ileum. Water and lipids are absorbed throughout the small intestine, including the duodenum and ileum in addition to the jejunum.