Final answer:
In biology, 'GB' refers to the gallbladder, an organ that stores liver-produced bile and releases it into the small intestine to aid in fatty food digestion.
Step-by-step explanation:
The 'GB' mentioned in the context of biology most likely refers to the gallbladder. The gallbladder is a small organ that stores bile produced by the liver. Bile is an important digestive fluid that is essential in the digestion and absorption of fats and fat-soluble vitamins in the small intestine. While the gallbladder primarily connects to the liver via the bile ducts, it also has an important relationship with the small intestine, specifically the duodenum, where bile is released to aid in digestion.