Final answer:
The gallbladder is a small organ located under the liver. Its function is to store and concentrate bile from the liver, releasing it into the duodenum to aid in fat digestion.
Step-by-step explanation:
The gallbladder is a small, hollow, pouch-like organ that lies just under the right side of the liver. It stores and concentrates bile from the liver until it is needed in the duodenum to help digest lipids. The gallbladder releases bile into the duodenum through the cystic duct when stimulated by the presence of fat in the duodenum. Bile aids in the digestion of fats.