What are the 3 regions of the nasal cavity?
This cavity is divided into two separate cavities by the septum and kept patent by a bone and cartilaginous framework. Each cavity consists of a roof, floor, medial wall, and lateral wall. Within each cavity are three regions; nasal vestibule, respiratory region, and olfactory region.
What are the three sections of the nasal passages and what are their functions?
The nasal cavity can be divided into the vestibule, respiratory and olfactory sections. The nasal vestibule is the dilated area at the nostril opening. The respiratory section of the nasal cavity refers to the passages through which air travels into the respiratory system.
What makes up the nasal cavity?
It is made up of the septal cartilage, the vomer bone, and the perpendicular plate of the ethmoid bone. The septal cartilage sits on top of the vomer bone and in front of the ethmoid bone, which it joins further back.
What types of epithelium cover the 3 nasal Conchae?
In each cavity are found the nasal conchae (conchae nasales superiores, mediae et inferiores). Inferior and medial conchae are covered by ciliated pseudostratified columnar epithelium. The superior conchae are covered by pseudostratified columnar epithelium with olfactory receptor cells.
What are the boundaries of the nasal cavity?
Boundaries of Nasal Cavity
- Nasal bones.
- Nasal part of frontal bone.
- Cribriform plate (ethmoid bone)
- Sphenoid bone.
What type of tissue is found in the nasal cavity?
The nasal vestibule is completely lined by squamous epithelium. It is a stratified epithelium composed of basal cells along the basal lamina and several layers of squamous cells, which become progressively flatter toward the luminal surface.
What are the three regions of the nasal cavity?
The nasal cavity was partitioned into three regions: the regio vestibularis (I, II), regio respiratoria (III, IV), and regio olfactoria (V). The superior nasal concha was long, the inferior nasal concha was short and wide, and the middle nasal concha was small and located ventral to the superior nasal concha.
How many levels of the nasal cavity are used in histology?
Three levels of the nasal cavity may be used for routine histologic review of the nasal cavity, but four or five levels may be more appropriate for certain studies. Schematic drawing of anterio-lateral aspect of maxilloturbinate shows six morphological cell types.
What structures open into the nasal cavity?
In addition to the paranasal sinuses, other structures open into the nasal cavity: Nasolacrimal duct – acts to drain tears from the eye. Auditory (Eustachian) tube – opens into the nasopharynx at the level of the inferior meatus.
How many types of epithelial tissue are there in the nasal cavity?
Normal histology of the nasal cavity and application of special techniques There are three major epithelial types in the nasal mucosa, in addition to numerous accessory structures, some of which are species specific.