Respuesta :
The Pharyngotympanic tube is the structure that enables pressure in the middle ear to equalize with ambient pressure.
The Eustachian tube connects the nasopharynx to the middle ear, of which it is also a component, in anatomy. It is also referred to as the auditory tube or the pharyngotympanic tube. The Eustachian tube in an adult human measures around[tex]35[/tex] mm [tex](1.4[/tex] in) length and [tex]3[/tex] mm [tex](0.12[/tex] in) in diameter. It bears the name Bartolomeo Eustachy after the Italian anatomist of the sixteenth century. Both the middle ear and the ear canal are typically filled with air in humans and other tetrapod. The air of the middle ear, however, is not in direct contact with the atmosphere outside the body, unlike the air of the ear canal.
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