SCIENCE
ABIRD'S digestive system is a simple structure when compared to that of a mammal. Nonetheless, it is an efficient one. It does its required job well, in breaking down food in order to supply the body with all the nutrients it requires to function.
The beak is the starting point of the alimentary canal, and varies in size and shape depending on the bird's diet. It is a robust structure, which consists of the protein keratin.
Salivary glands lubricate the food as necessary and begin the digestion process. These glands are situated in the and Although they start digestion off, it is a relatively minimal contribution,