Suggest you do vagina, bladder, and CSF.
expressed in the stomach but not expressed in the small intestine
First, food goes to stomach where pepsin (a protease enzyme) is released into the stomach. The food then enters the small intestine and at this point, any pancreatic enzymes are released from the pancreas. The enzymes present in the small intestine include: Lactose, DPP IV and dissacharrides.
because each enzyme has an own purpose
pepsin
Nothing is in the stomach except brain
pepcin
yes.
Your saliva produces enzymes to break down food and your stomach has them too, but I am pretty sure that your stomach doesn't produce as much as your saliva.
No, enzymes like salivary amylase will denature when subjected to the low pH of the gastric juices. This is why there are similar, but slightly different enzymes released in the stomach. Some (like pepsin) are only activated through the high hydrochloric acid concentration.
Acids and enzymes are what begin the process of "digesting" our food. Saliva supplies many of the enzymes, the stomach supplies the acid.
The small intestine produces digestive enzymes. Certain things that you eat are digested in different parts of the body by different systems.
stomach contain HCl and enzymes called renin and pepsin