Question

which term means \collection of pus in a body cavity\?
phlegm
epistaxis
empyema
effusion

Explanation:

• Phlegm is mucus from the respiratory tract, not a collection of pus in a body cavity.
• Epistaxis is a nosebleed, not related to pus collection.
• Effusion is the escape of fluid from blood vessels, not specifically pus.
• Empyema is defined as a collection of pus in a body cavity (like the pleural cavity).

Answer:

empyema