In the upper digestive tract,mechanical breakdown occurs in the __________.

Question

Quizplus · Accepted Answer

Mechanical breakdown, or the physical breakdown of food, begins in the mouth through biting, chewing, and mixing with saliva before being swallowed into the esophagus. The stomach also performs some mechanical breakdown through muscular contractions, but it is mainly responsible for chemical breakdown through the secretion of digestive enzymes and acids. Therefore, the correct answer is A) mouth, where most of the mechanical breakdown occurs.

In the Upper Digestive Tract,mechanical Breakdown Occurs in the __________