A cough typically produces which of the following?

A cough typically produces sputum, which is a type of mucus that is expelled from the respiratory tract. Sputum contains not only mucus but also other materials, such as dead cells and microorganisms, which may have accumulated in the airways due to infections, allergies, or other respiratory conditions.

Sputum is often analyzed in clinical settings to help diagnose respiratory illnesses. When a person coughs, especially when they are dealing with an infection or irritation in the lungs, the body produces more mucus in response to help trap and eliminate these irritants. The particular focus on sputum distinguishes it from other types of mucus that may be present in the mouth or throat.

While mucus and phlegm are similar and sometimes used interchangeably in everyday conversation, in a clinical context, sputum specifically refers to the mucus that is coughed up from the lungs. Thus, identifying sputum as the correct answer highlights its specific role in the body's response to respiratory issues.