Final answer:
The liver is responsible for filtering blood and producing bile, which aids in the digestion of fats in the duodenum. The gallbladder stores and concentrates this bile, while the pancreas secretes digestive enzymes and bicarbonate.
Step-by-step explanation:
The part of the body that filters blood and makes bile, a digestive fluid, is the liver. The liver is the largest internal organ in humans and plays a crucial role in digestion and excretion. It produces bile, which is secreted into the duodenum of the small intestine. Bile is essential for breaking down fats and also helps to reduce the acidity of food coming from the stomach, making the environment in the duodenum more conducive to digestive enzymes.
The gallbladder is an accessory organ that stores and concentrates bile produced by the liver. It releases bile into the duodenum to aid in the digestion of fats. While the pancreas secretes digestive enzymes and bicarbonate to the duodenum, it does not produce bile. Therefore, for the question posed, the correct answer is c) Liver.