0204 Plant Sciences. 1  Plant Sciences, General. 2  Agronomy and Crop Science. 3  Horticulture Science.  Plant Breeding and 1  Genetics. Agricultural Plant Pathology.  Agricultural Plant 1  Physiology. Plant Protection (Pest Management)  Range Science and Management.
The roof of the nasal cavity is formed anteriorly by the nasal bones, the nasal spine of the frontal bone, and the floor of the frontal sinus. In its more horizontal midpart, the roof is formed by the cribriform plate of the ethmoid bone.part from the nasal vestibule which is lined by stratified squamous epithelium, nasal cavity is lined by pseudostratified columner ciliated epithelium i.e. respiratory epithelium. Each nasal fossa has four walls; roof, floor, septal wall, and lateral wall.
The vomer bone lies below and to the back (posteroinferiorly), and partially forms the choanal opening into the nasopharynx, (the upper portion of the pharynx that is continuous with the nasal passages). The floor of the nose comprises the premaxilla bone and the palatine bone, the roof of the mouth. The nasal septum is composed of the quadrangular cartilage, the vomer bone (the perpendicular plate of the ethmoid bone), aspects of the premaxilla, and the palatine bones.