Abstract
The auricle develops from six knob-like protuberances, arising from the first and second branchial arches, which fuse to form auricular components, such as the helix, antihelix and tragus. The external auditory meatus is derived from the first branchial groove, a depression of the ectoderm between the first (mandibular) arch and the second (hyoid) arch. The deep extremity of this groove meets the outer epithelium of the corresponding first pharyngeal pouch, separated from it by only a thin layer of connective tissue. The point of meeting produces the tympanic membrane.
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