Which of the following statement is true about Pinna except:
In Treacher-Collins syndrome malformed pinna may be present
Made up of elastic cailage
Develop from lst pharyngeal cleft only
Helps in localization of sound
Ans. c. Develop from lst pharyngeal cleft onlyFirst branchial cleft is the precursor of external auditory canal.Around the sixth week of embryonic life, a series of six tubercles appear around the first branchial cleftBranchial clefts are ectodermal in origin.Pinna develops from 1st and 2nd pharyngeal arch