Proteins
Food---but once it is chewed, on its way to the stomach it is called 'bolus'
Yes, it is.
No. its chemical
the chemicals in the stomach are there to break down the food that enters, there are certain chemicals that stop the acid in the stomach burning the stomach walls and infecting your body.
Dogs will generally get diarrhea and stomach upset when their food is changed. You should make the switch gradually to prevent this. Also, some dogs have allergies to certain foods, and this can cause stomach upset as well. If your dog continues to have stomach problems after two months or more of being on the new food, you should consider switching to a different protein source.
From the moment ingested food is exposed to saliva to acids in the stomach until it is absorbed into the blood in the stomach or intestines different food products are undergoing chemical change.
Carbohydrates leave the stomach first, second are proteins and last to leave are fats
well the liver squirts an enyme called amalaz into the stomach and then it get churned around by the hydrochloride acid then it is parcely dissolved and sent into the mall intestine
Its a chemical change. A physical change is a change which does not change the type of matter. The reactions in your stomach break down the matter into other substances.
Actually an animal has to have a stomach to live or else i would not be able to digest food through the stomach and if it had no teeth it would have to have strong jaws to chew up food or eat smooth food like soft food
Besides drugs...? Pretty much anything i guess. Certain types of food, certain types of music, etc.