<prompt> Principal blood supply to tonsil is fromLingual aeryDescending palatine aeryAscending pharyngeal aeryFacial aery  <response>: Aerial supply of tonsil: Tonsillar branch of facial aery Principal blood supply Dorsalis linguae branches of lingual aery. Ascending palatine, a branch of facial aery. Ascending pharyngeal, a branch of external carotid aery. Greater palatine descending palatine, a branch of maxillary aery. 