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 posterior ethmoidal sinuses open out at the level of the superior meatus. The only structure not to empty out onto the lateral walls of the nasal cavity is the sphenoid sinus. It drains onto the posterior roof. In addition to the paranasal sinuses, other structures open into the nasal cavity. The nasolacrimal duct acts to drain tears from the eye â it opens into the inferior meatus. The auditory (or eustachian) tube opens into the nasopharynx at the level of the inferior meatus.