Final answer:
Ceruminous glands are modified sweat glands located in the external auditory canal and are responsible for producing earwax which helps protect the ear.
Step-by-step explanation:
The ceruminous glands are modified sweat glands located in the external auditory canal. These glands are a type of exocrine gland, specifically a modified sudoriferous (sweat) gland, that release their secretions through ducts. Unlike the sweat glands and sebaceous (oil) glands found in the reticular layer of the dermis, ceruminous glands are in the skin of the human ear canal, where they produce cerumen, also known as earwax. This substance helps to protect the ear by trapping dust, bacteria, and other foreign particles to prevent them from entering and damaging the ear.