Which substance does the liver produce to aid digestion?

• A. Mucus
• B. Insulin
• C. Saliva
• D. Bile

Answer: (D)

Bile is produced by the liver and helps digest fats. It contains bile acids that emulsify fats, breaking large fat globules into tiny droplets so they have a larger surface area for pancreatic enzymes to act on. This emulsification is essential for efficient fat digestion. Bile is made in liver cells, stored in the gallbladder, and released into the small intestine when fatty foods are present. In contrast, mucus is produced to protect and lubricate the digestive tract, insulin is a hormone from the pancreas that controls blood sugar, and saliva is produced by the salivary glands to start breaking down carbohydrates. So, the liver’s product that aids digestion is bile.