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What is Which of the following is not derived from 1st pharyngeal pouch? and explain in detail?
Ans. D Palatine tonsilsRef: I.B. Singh, 9th ed. pg. 1118; Fundamental Anatomy By Walter Carl Hartwig, pg. 185* First pharyngeal pouch is located between 1st and 2nd pharyngeal arch* Palatine tonsil is a derivative of 2nd pharyngeal pouch* Eustachean tube, Middle ear, mastoid antrum and tympanic membrane is derived from 1st pharyngeal pouch.