In the formation of the embryo the first and perhaps most important physical differentiation is gastrolization, which is the formation of the alimentory canal.
Mouth (i have a mouth) (do you?)
the pyloric sphincter valve
The major organ responsible for chemical digestion and absorption of food is the small intestine.
The first major site of chemical digestion in frog is their stomach
Its the mouth.........cause saliva breaks down some amount of starch into simple sugars. but its not a very major site..............
I don't think of it as an organ, but chemical digestion of starch begins in the mouth, using saliva.
Stomach
fatty acidsglycerol
The organ responsible for most of the chemical digestion in the human body is mainly the stomach.
Salivary glands
In the stomach.
Some chemical digestion of carbohydrates occurs in the mouth with salivary amylase. Most chemical digestion occurs in the duodenum of the small intestine.
heart
The mouth is where literally begins,