Partial Cross-Section of Adult Skull
Displaying the divisions of the ear and naso-pharyngeal cavity. As you can see, even though the skull has some pretty well-defined zones and areas, everything is a lot more inter-connected than most of us learn about in grade school. The close connection between the ear canal and throat is why, when you have a sore throat, many times earaches come along with it, and why when you have a sinus headache, the ears often feel “plugged up”.
A Practical Treatise on the Diseases of the Ear Including a Sketch of Aural Anatomy and Physiology. D. B. St. John Roosa, 1884.