In what parts of the digestive system do mechanical and chemical digestion take place? how do the process occurs? please help thx?

Terminology

First on the list of organs in the digestive tract is the mouth, which performs Mechanical Digestion (teeth breaking, grinding, breaking, shredding, and mashing food into small pieces that are easy to swallow and digest; saliva is an enzyme that begins to break down carbohydrates, if any). For this reason, the mouth also performs Chemical Digestion (once the food is ready to be swallowed, it is pushed into the Pharynx and into the esophagus*) where it is squeezed out of the food using rhythamic muscle contractions—a process known as Peristalsis).

The stomach is the next stop on the digestive tract. Here, some, but not all, of the digestion takes place. In fact, most of the chemical digestion happens here, as the stomach compresses its contents. Enzymes break down the food into nutrients, which are then processed in the large and small intestines. The small intestine absorbs the nutrients and sends them to the bloodstream. Here, the majority of the chemical digestion occurs, and there is no mechanical digestion at all. The "food" in this section is now referred to as chyme, a soupy mixture that is moved by peristalsis. The large intestine sort of processes the waste to be sent to the rectum and anus, where the waste will leave the body.

Additional remarks

Mechanical digestion primarily occurs in the mouth and stomach, where food is physically broken down into smaller pieces. Chemical digestion primarily occurs in the mouth (through saliva), stomach (through gastric juices), and small intestine (through enzymes produced by the pancreas and liver). In the mouth, salivary enzymes begin the breakdown of carbohydrates. In the stomach, gastric juices break down proteins, and in the small intestine, enzymes break down carbohydrates, proteins, and fats.