Which digestive organs assist in breaking down food?

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Prepare for the UCF Biological Principles Exam. Use flashcards and multiple-choice questions with hints and explanations to succeed on your exam!

The mouth, stomach, and small intestines play crucial roles in the digestion and breakdown of food.

In the mouth, digestion begins as food is mechanically broken down by chewing and mixed with saliva, which contains enzymes like amylase that start the process of carbohydrate digestion.

Once food enters the stomach, it is mixed with gastric juices that contain hydrochloric acid and digestive enzymes. This environment not only aids in breaking down proteins but also helps to kill bacteria. The churning action of the stomach muscular walls further breaks food into a semi-liquid form called chyme.

As chyme moves into the small intestines, digestion continues with the help of enzymes from the pancreas and bile from the liver. The small intestine is where the majority of nutrient absorption occurs. The lining of the small intestines is covered in tiny projections called villi, which increase the surface area and facilitate the absorption of nutrients into the bloodstream.

Together, these three organs work in concert to ensure that food is effectively broken down into smaller, absorbable components, making the choice that includes the mouth, stomach, and small intestines the comprehensive answer to the question concerning digestive organs involved in food breakdown.