Concept:Understanding the functions of different glands in the digestive system.Explanation:Digestive enzymes are crucial for breaking down food. Let's look at the options:A. Pancreas: Secretes pancreatic juice containing enzymes like amylase, lipase, and proteases, which are essential for digestion.B. Salivary glands: Produce saliva which contains amylase, an enzyme that starts the digestion of carbohydrates.C. Gastric glands: Located in the stomach lining, these glands secrete gastric juice, which contains enzymes like pepsin (for protein digestion) and hydrochloric acid (HCl).D. Liver: The liver produces bile, which aids in fat digestion by emulsification, but it does not secrete digestive enzymes itself. Bile is released into the small intestine.Therefore, the gland that does not secrete digestive enzymes is the liver.Answer:D. Liver