Why doesn't food need gravity to get to the stomach?

Food doesn't need gravity to reach the stomach because the digestive system relies on a series of muscular contractions known as peristalsis. These contractions push food down the esophagus and through the gastrointestinal tract, moving it along regardless of orientation. Additionally, the presence of saliva and digestive enzymes facilitates the breakdown of food, aiding its movement. Thus, even in a microgravity environment, food can still be effectively transported to the stomach.