Answer: Receives food that the duodenum have been digesting;
And then begins the absorption of major nutrients as well as Vitamin B12 and bile salts.
Explanation: The duodenum which is the first section of the small intestine is where most of the chemical digestion takes place as well as absorption of iron, enzymes are been secreted from the gall bladder, pancreas, liver et cetera into the duodenum to help breakdown the fat and protein as well as further break down the carbohydrates.
The food then goes through the jejunum and lleum where absorption of major nutrients as well as Vitamin B12 and bile salts into the blood stream begins.