What do ceruminous glands of the external auditory canal secrete?

Ceruminous glands, located in the external auditory canal, are specialized sweat glands that primarily secrete a substance known as earwax, or cerumen. This waxy secretion plays a crucial role in ear health by serving several purposes.

Firstly, earwax helps to trap dust, debris, and microorganisms, thus preventing them from entering deeper into the ear canal and potentially causing infections or other issues. Secondly, it acts as a natural lubricant to keep the ear canal moist and prevent irritation or itching. Additionally, the composition of earwax includes antimicrobial properties, providing further protection against infections.

While other options mention fluids or substances related to the ear, they do not accurately describe the function of the ceruminous glands, which specifically produce earwax as part of the body's defense mechanism for the auditory system.