"Cerumen [earwax] in the external auditory canal provides a sticky barrier that prevents the enterance of foreign bodies, such as insects." (p.130)
Sorry, that caught me so off gaurd when I was reading it, I cracked up. Thought I'd share the joy.
Really though, insects???
Excerpt from Principles of Human Anatomy, 11th Ed. Tortora and Nielsen.
Photo by Chris Gin http://www.flickr.com/photos/chris_gin/3427532199/ Some rights reserved.