Multiple choice general knowledge science & technology Which internal organ stores and concentrates bile and functions in fat digestion Liver Appendix Thyroid Gall Bladder Reveal answer Fill a bubble to check yourself D Correct answer Explanation The gall bladder stores and concentrates bile produced by the liver, releasing it into the small intestine to aid in fat digestion. The liver produces bile but does not store it, while the appendix and thyroid have unrelated digestive functions.