What does the color of sputum mean?

What is sputum
In a normal state, a person has transparent mucus on the bronchial mucosa and trachea, the so-called tracheobronchial secretion. It is produced by cells of the bronchial mucosa and performs important protective and cleansing functions, moisturizes the walls of the bronchi.

Due to the cilia located on the walls of the bronchi, this mucus moves to the throat. Together with it, microbes, dust, dead cells that have fallen into the respiratory tract are removed. In addition, this secret has bactericidal properties due to the content of immune cells. When pathogenic microorganisms enter, these cells instantly react and destroy them. Continue reading →