part of part of Homo sapiens temporal bone bone foramen external auditory meatus of squamous part of temporal bone 2026-03-19T00:00:00Z A bone foramen forming the lateral opening of the external acoustic canal, bounded superiorly and posteriorly by the squamous and tympanic parts of the temporal bone. It transmits sound waves toward the tympanic membrane and is partly formed by the tympanic plate inferiorly. David Osumi-Sutherland