What is the definition of peristalsis?

Peristalsis is the wave-like muscular contractions that move food through the digestive tract. It's a coordinated series of muscle contractions and relaxations that propel the bolus (a mass of food) along the digestive tract.

Here's a breakdown:

* Muscular contractions: The muscles in the digestive tract walls contract, squeezing the bolus forward.

* Relaxations: As the bolus moves, the muscles behind it relax, allowing the food to continue moving through the tract.

* Wave-like motion: This alternating pattern of contractions and relaxations creates a wave-like motion that propels the food along.

Peristalsis is essential for:

* Moving food: It's the main force responsible for moving food from the mouth to the anus.

* Digestion: It mixes food with digestive juices, allowing for proper breakdown and absorption.

* Waste elimination: Peristalsis also moves waste products out of the body.

In short, peristalsis is the muscle power that keeps our digestive system running smoothly.