MEDICAL ENCYCLOPEDIA. 1  Back pain - returning to work. 2  Back pain and sports. 3  Compression fractures of the back. 4  Lifting and bending the right way. 5  Lumbosacral spine x-ray. 6  Returning to sports after a back injury. 7  Spinal fusion. 8  Spinal fusion - slideshow. 9  Vertebroplasty - slideshow.
The mucociliary escalator is one of the major defense mechanisms, which protect the lung, and if the mucociliary escalator fails, it increases the risk that the normal and potentially pathogenic, inhabitants of the nose, throat and the back of the mouth, will descend into the lung, resulting in a potentially life-threatening pneumonia ( Anatomy and Physiology, 2013, p. 139).
The auditory tube, sometimes called the eustachian tube, is a tiny channel that runs from the middle ear to the back of the throat (nasopharynx). The auditory tube has several important functions: It opens and closes in response to changes in ambient air pressure in order to equalize pressure in the middle ear.