Medicine and Health related Information

Fate of Ectodermal Clefts

After the formation of pharyngheal arches the region of the neck is marked on outside by series of grooves or ectodermal clefts. 1) The dorsal part of 1st cleft develops into epithelial lining of the external auditory meatus. 2) The pinna is formed from a series of swellings, which arise on the 1st and 2nd [...]

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