All these factors affect the rate at which food passes through the digestive tract.

In 1806, there were only a few poor roads through the tract.

Silently, and without any real interest, Gillian read through the entire tract.

This sound is changed as it travels through the vocal tract.

The small pieces can then move through the urinary tract more easily.

The team has found that cats can be infected through the respiratory tract.

These small pieces move through the urinary tract and out of the body more easily than a large stone.

The estate was divided into town lots with a street through the tract.

"Think of all the viruses out there that have to get through the gastrointestinal tract," she said.

His voice echoed back and forth through the deserted tract.