Bilis is a yellowish-green fluid produced by the liver that aids in digestion. It is stored in the gallbladder and released into the small intestine to help break down fats. This fluid contains bile salts, cholesterol, and waste products, playing a crucial role in the digestive process. When the body has excess bilirubin, a component of bile, it can lead to conditions like jaundice, where the skin and eyes turn yellow. Proper functioning of the liver and gallbladder is essential for maintaining healthy bile production and digestion.