The palate cavity ( sinus palatinus ) is a small paranasal sinus in ungulates that pneumatizes the interior of the palatine bone ( os palatinum ). In ruminants , it is an independent formation that lies on each side in the perpendicular part of the palatine bone (os palatinum). In horses joins the sphenoid sinus to sine sphenopalatinus .
In half of all cases there is a septum between the sphenoid sinus system and the palatal cavity. There are deep pockets at the bottom of this. Similar to the nasal delimitation of the palatal cavities, which lies ventrally and nasally from the maxillary sinus opening and also form pockets.