An enzyme used to decompose the lipids into fatty acids in our alimentary canal is

Explanation

Pancreatic lipase hydrolyses triglycerides into fatty acids and glycerol in the duodenum, working on the enormous surface created after bile salts have emulsified the fat. Amylase acts on starch and protease on protein, each enzyme being specific to one class of substrate. Urease breaks urea down and is found in bacteria and plants rather than the human gut.