The river is best known for establishing the borderline at its lower tract.

There are a number of acute and chronic infections that can affect the lower respiratory tract.

People take quebracho for asthma and conditions of the lower respiratory tract.

If the initial infection is mostly in the lower tract, after treatment the person may have few difficulties.

As a result, the upper and lower respiratory tract does not have a normal bacterial flora.

Full evaluation of the upper and lower urinary tract is required.

The lungs are the biggest organ in the lower respiratory tract.

Bronchitis is another common infection that takes place in the lower respiratory tract.

Tuberculosis is one of many other infections that occurs in the lower respiratory tract.

A common problem after surgery is a build-up of gas in the lower gastrointestinal tract.