GENERAL HISTOLOGY

Detailed explanation-1: -Where does chemical digestion begin? Chemical digestion begins in your mouth. As you chew, your salivary glands release saliva into your mouth. The saliva contains digestive enzymes that start off the process of chemical digestion.

Detailed explanation-2: -The major types of enzymes involved in the chemical digestion of food are protease, amylase, and lipase. Protease digests proteins into amino acids while amylase digests carbohydrates into simple sugars and lipase breaks down lipids into fatty acids.

Detailed explanation-3: -Chemical digestion breaks large food molecules down into their chemical building blocks, which can then be absorbed through the intestinal wall and into the general circulation. Intestinal brush border enzymes and pancreatic enzymes are responsible for the majority of chemical digestion.

Detailed explanation-4: -The exocrine pancreas and certain salivary glands of mammals secrete a variety of enzymes into the gastrointestinal tract, where they digest food. The same glands also release these enzymes into the bloodstream.

Detailed explanation-5: -Chemical digestion takes place throughout your digestive tract. Chemical digestion begins in your mouth with your saliva. The process continues in your stomach and is completed in your small intestine. The majority of chemical digestion takes place in your small intestine.