Does the appendix and kidneys add juices to help digestion?

The appendix does not play a significant role in digestion, and it does not add any juices to aid the digestive process. Its exact function is not fully understood, but it is believed to have a role in the immune system.

On the other hand, the kidneys are essential organs involved in maintaining fluid and electrolyte balance in the body. However, they are not directly involved in the digestion process or adding digestive juices.