What organ contains a sac that stores bile produced by the liver?

The gallbladder is the organ responsible for storing bile produced by the liver. Bile is a digestive fluid that helps emulsify fats in the digestive process. The liver produces bile continuously, but it is stored in the gallbladder until it is needed for digestion, primarily after the consumption of fats. When food enters the small intestine, hormones stimulate the gallbladder to release bile through the bile ducts into the intestine, aiding in fat digestion.

The spleen, while an important organ for filtering blood and managing red blood cells, does not store bile. The pancreas plays a crucial role in digestion and hormone production, such as insulin, but it does not store bile either. The kidneys are involved in urine production and filtration but have no function related to bile storage. Thus, the gallbladder is uniquely suited for this purpose.