<prompt> Paltine tonsil develops from?1st pharyngeal arch1st pharyngeal pouch2nd pharyngeal arch2nd pharyngeal pouch  <response>: The palatine tonsil develops on each sidein relation to the lateral pa of the second pharyngeal pouch.the endoderm lining the pouch undergoes considerable proliferation.it invades the underlying mesoderm of second arch,which forms the tonsilar strauma HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:178 