It's fairly simple. Any animal that eats plants is a herbivore. as humans, we are omnivores as we eat both plants and animals. Plants store their energy as starch, or amylose. This is a very long molecule that takes a long time to break down. Therefore, in the herb/omnivore's saliva is an enzyme called amylase. This starts to break down starch molecules in plant matter in the mouth.
On the other hand, carnivores eat meat- predominantly proteins. Protein will be digested in the stomach and small intestine once the stomach acid and protease enzymes break down there molecules. As meat doesn't contain starch, starting digestion in the mouth would be pointless.
what is responsible for chemical digestion in earthworms
Antacids affect chemical digestion by increasing the pH in the stomach.
to begin the digestion of proteins
No, it is chemical digestion.
This is when food particles are breaking down into even tinier pieces by: hydrochloric acid in your stomach. That is chemical digestion.
mechanical digestion is with your teeth , chemical digestion is in your stomach and small intestine.
the stomach
Stomach
Both the mouth and the stomach perform mechanical and chemical digestion.
Yes, in part. Chemical digestion occurs in the mouth (saliva), stomach (gastric acid) and small intestine. The nutrients are mostly absorbed in the walls (lining) of the small intestine.
Stomach
Enzymes, they are responsible in chemical digestion.