The add juices to digestion

appendix and kidneys

liver and pancreas

kidneys and liver

Explanation:

Actually there are three organs that help in digestion processes: liver, pancreas and gallbladder.

First, the liver produces bile to breakdown fats, vitamins and proteins, helping to remove toxins. Similarly, the gallbladder stores the bile produced by the liver, when it's need, gallbladder send bile through the small intestine.

On the other hand, pancreas helps in digestion processes by producing enzymes that help to breakdown proteins, fats and carbohydrates.

That's why liver and pancreas is the right answer. Besides, kidneys functions is to filter blood.