What type of tissue covers the outer layer of the external auditory canal?

The outer layer of the external auditory canal is covered by skin, which is a critical type of tissue that serves several important functions. Skin, being the outermost layer, provides a protective barrier that safeguards the underlying structures from environmental elements such as dirt, moisture, and pathogens. The skin in this area is specialized and includes sebaceous glands that contribute to earwax production, helping to keep the canal moist and trap small particles and microorganisms. Additionally, it contains sensory receptors that can detect temperature and touch, adding to the overall protective function of the ear.

In contrast, bone and cartilage can be found within the structure of the ear, but they do not cover the external auditory canal. Muscle tissue is not present in this context either, as it does not serve the function of covering or protecting the canal. Thus, recognizing that the external auditory canal is primarily covered by skin highlights its role in both protection and sensory input.