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Normally this space is continuous with the space at the back of the mouth, but in swallowing it is shut off from the oropharynx by the soft palate pressing against the back wall. On the back wall of the nasopharynx are the openings of the EUSTACHIAN TUBES and, in childhood, the ADENOIDS. Nasopharynx The passage that connects the nasal cavity to the top of the throat.
The eustachian tube is surrounded by muscles that function to open and close the tube depending on the situation. This allows for ânormalâ functioning of the tube. Often, the Eustachian Tube functions poorly leading to ear infections and fluid build-up in the middle ear cavity. This occurs because the tube does not open appropriately. Patient with Patulous Eustachian Tube (PET) have the opposite problem, with the eustachian tube remaining open and not closing appropriately.