Mr. smoke has had a persistent cough and hoarseness for several months. the doctor has scheduled mr. smoke for an examination of the interior of the bronchi using a lighted, flexible tube known as an endoscope in order to observe the air passages for signs of disease and to obtain a biopsy of bronchial tissue for examination. this procedure is called

The procedure is called Respiratory endoscopy or bronchoscopy.

Explanation:

This kind of procedure is able to take a look down into the respiratory tract in order to observe possible symptoms of some diseases. As the endoscope can reach the bronchi, it's possible to extract a piece of tissue in order to analyze it and understand better the patient's diagnosis.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides