Which one of the following organs is not a part of the digestive system?

Of the following groups of structures, the one that contains only accessory structures is

The digestive tube between the pharynx and the stomach is the

The correct sequence of a food particle moving through the digestive tract is

The physical manipulation of solid foods by the tongue and teeth and the swirling and mixing motions of the digestive tract is called

The chemical breakdown of food into small organic fragments that can be absorbed by the digestive epithelium is

Where mechanical stresses are most severe, such as in the oral cavity, pharynx, esophagus, and anus, the digestive tract is lined by

The cells of the gastric glands in the fundus and body of the stomach that produce the components of gastric juice are

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

The layer of the intestinal wall that contracts and changes the shape of the intestinal lumen to move food along its length is the

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

Most of the digestive tract is lined by

Modifications of the mucosa of the small intestine that allow for an increase in surface area are the

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

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

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

Once a bolus of food has entered the laryngopharynx, swallowing continues involuntarily due to the

The proper sequence of swallowing involves three sequential phases consisting of the

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

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