Digestion of food begins in which part of alimentary canal in human beings?

Mouth

The correct answer is Option (4)- Mouth

Digestion of food begins in the Mouth in human beings.

Explanation:

• The process of digestion begins with the mechanical and chemical breakdown of food in the mouth.
• In the mouth, food is physically broken down by chewing and mixed with saliva, which contains enzymes like amylase.
• Amylase, an enzyme in saliva, starts the chemical digestion of carbohydrates, breaking down starches into simpler sugars.
• The partially digested food, now called bolus, is formed in the mouth before being swallowed and passed through the digestive system.

While digestion continues in the stomach, small intestine, and large intestine, the initial stages of digestion, especially for carbohydrates, take place in the mouth. The various enzymes and acids in the digestive system work together to break down food into nutrients that can be absorbed by the body.