Eustachian tube anatomy:

The eustachian tube is the tube that runs between the middle ear and pharynx and regulates the ear pressure around the ear drum.
- Reviewed last on: 7/25/2007
- James L. Demetroulakos, M.D., F.A.C.S., Department of Otolaryngology, North Shore Medical Center, Salem, MA. Clinical Instructor in Otology and Laryngology, Harvard Medical School. Review provided by VeriMed Healthcare Network.