Question

which term means \thick mucus secreted by tissues lining respiratory passages\? sputum effusion empyema phlegm

Explanation:

• Sputum is the thick mucus secreted by tissues lining respiratory passages.
• Effusion refers to the escape of fluid from blood vessels into surrounding tissues.
• Empyema is the collection of pus in a body cavity, especially the pleural cavity.
• Phlegm is a more general term for mucus, but in medical terminology, "sputum" is specifically used for the mucus from the respiratory passages.

Answer:

sputum