Bile production
The liver produces and secretes about 600-700 ml of bile each day bile contains no digestive enzymes, but it plays a role in digestion because it neutralizes and dilutes acid and emulsifies fats. The pH of chyme as it leaves the stomach is too low for the normal function of pancreatic enzymes. Bicarbonate ions in bile help neutralize the acidic chyme and bring the pH up to a level at which prancreatic enzyme can function. Bile salts emulsify fats, changing large lipid droplets into much smaller droplets. Bile contains excretory products, such as the bile pigment Bilirubin. Bile also contains cholesterol, fats, fat-soluble hormones, and lecithin.