Final answer:
The alimentary canal is responsible for the digestion process in the human body. It breaks down macromolecules such as carbohydrates, proteins, and lipids into smaller molecules that can be absorbed and used by the body.
Step-by-step explanation:
The alimentary canal is responsible for the digestion process in the human body. It is a long, muscular tube that runs from the mouth to the anus. In the alimentary canal, macromolecules such as carbohydrates, proteins, and lipids are broken down into smaller molecules that can be absorbed and used by the body. For example, amylases in the mouth break down carbohydrates, trypsin and lipase in the stomach digest proteins, and bile emulsifies lipids in the small intestine.