Which organ is primarily responsible for storing bile?

The gallbladder is primarily responsible for storing bile, a digestive fluid produced by the liver. After the liver secretes bile, it is collected and concentrated in the gallbladder until needed for digestion. When fatty foods are consumed, the gallbladder releases bile into the small intestine, aiding in the digestion and absorption of fats.

The other organs listed do not serve this function. The spleen is involved in filtering blood and managing immune responses, the kidneys are responsible for filtering waste from the blood and producing urine, and the pancreas produces digestive enzymes and hormones like insulin, but does not store bile. Understanding this relationship highlights the gallbladder's critical role in digestive health.