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Which of the following correctly describes the role of the mouth in the digestive system?

The mouth acts like a muscular bag by churning the food and producing enzymes that aid in chemical digestion.


The mouth produces all of the enzymes needed for digestion and these enzymes are swallowed, which moves them through the digestive tract.


The mouth begins the process of digestion by mechanically breaking food into smaller pieces.


The mouth performs the peristalsis that pushes food through the rest of the digestive system.

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Answer:

The mouth begins the process of digestion by mechanically breaking food into smaller pieces.

Explanation:

Digestion is a crucial process that involves the break down of complex food molecules into simpler ones that are assimilable by the body. The process of digestion in humans, for example, is said to begin in the MOUTH where the food enters through.

The mouth via the use of teeth helps the initially break down the food particles using mechanical/physical method. This further helps the break down of the food into tiny particles before they are acted on enzymatically.

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