multi-tissue structure secondary palate http://upload.wikimedia.org/wikipedia/commons/3/31/Pig_snout_sagittal_cut.jpg http://upload.wikimedia.org/wikipedia/commons/d/d4/Illu01_head_neck.jpg UMLS:C1519217 oral roof uberon UBERON:0001716 UMLS:C0700374 present in mammals and some reptiles. A similar structure is found in crocodilians, but, in most other tetrapods, the oral and nasal cavities are not truly separate. The secondary palate is formed by bilateral medial extensions of maxillary processes. The extensions (palatine processes) meet at the midline, merging dorsally with nasal septum and rostrally with primary palate. The secondary palate (hard palate) separates nasal and oral cavities. Caudal extension of the secondary palate into the pharynx, forms a soft palate which divides the rostral pharynx into dorsal (nasopharynx) and ventral (oropharynx) chamber. MESH:D010159 The part of the palate formed from the fusion of the two palatine shelves, extensions of the maxillary prominences. EMAPA:18948 palatum NCIT:C12229 definitive palate palatum secundarium roof of mouth galen:Palate palatum NCIT:C34292 MA:0002476 palate palatal palatum definitivum FMA:54549 separates respiratory and oral passages GAID:152 BTO:0001779 neural crest-derived structure