The Digestive System

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Waves of muscular contractions that propel the contents of the digestive tract from one point to another are called

The backflow of materials from the stomach into the esophagus is due to the active contraction of the

In the small intestine, fingerlike projections called villi are formed by the mucosa and serve to

The layer of loose connective tissue that contains blood vessels, lymphatic vessels, and a network of nerve fibers, sensory neurons, and parasympathetic motor neurons is the

Regional movements that occur in the small intestine and function to churn and fragment the digestive materials are called

Most of the digestive tract is lined by

Swirling, mixing, and churning motions of the digestive tract provide

Double sheets of serous membrane composed of the parietal peritoneum and the visceral peritoneum are called the