Which of the following processes is part of the digestive system?

The digestive system encompasses a range of processes essential for breaking down food and absorbing nutrients. Peristalsis refers to the wave-like muscle contractions that move food through the digestive tract, beginning in the esophagus and continuing through the intestines. This rhythmic movement is crucial for transporting food as it is digested.

Mastication is the mechanical process of chewing food in the mouth, which increases the surface area for enzymes to act on during digestion. This initial step is fundamental for effective digestion as it helps break down food into smaller pieces.

Swallowing is the act of moving chewed food from the mouth into the esophagus, facilitating the continuation of the digestive process.

Each of these processes plays a vital role in the overall function of the digestive system, making the answer that includes all three processes the most comprehensive and accurate choice.