The answer would probably be starch since this is the only nutrient that start to be digested in mouth and along the esophagus to the stomach.
More accurate to say 'none', for although saliva does start digestion that is added in the mouth and the oesophagus is simply the conduit from mouth to stomach.
It is starch! I think
Starch is digested by ptyalin.
food!!
Protein into amino acids by enzymes and hydrochloric acid!
Amino Acid
The esophagus leads to the frog's stomach. The esophagus is a tube that connects the mouth to the stomach, allowing food to pass and be digested.
Sesame seeds are a very good source of fibre and roughage which cleans out your digestive system. They are also 25% protein, including methionine and tryptophan, which may be missing from other plant foods.
Protien
Nothing is digested by the liver in the digestive system at all. So there is basically no answer to it.
The pharynx is the tube which food passes threw after it is chemically and mechanically digested in the mouth. This leads to the esophagus then to the stomach.
proteinslipidscarbohydrates
The esophagus works with other systems of the body by transporting food down to the stomach so it can be digested.