The pinna and external acoustic meatus refer to the same structure.

Name: The pinna and external acoustic meatus refer to the same structure.
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The pinna (also known as the auricle) is the visible external part of the ear, while the external acoustic meatus refers to the ear canal that leads to the middle ear. They are two separate structures, although they are connected as part of the outer ear.

The Pinna and External Acoustic Meatus Refer to the Same