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Equine Upper Respiratory Tract - Horse Anatomy (view source)
Revision as of 16:31, 18 November 2012
, 16:31, 18 November 2012→Nasal Cavity
The nasal cavity is the area between the nostrils and the cribiform plate, it is divided by a septum into right and left sides. The '''nasal conchae''', also known as ethmoturbinate, are scroll-shaped bones covered with nasal mucosa that project into the nasal cavity. The first endoturbinate is the base of the dorsal nasal conchae. It extends the furthest into the nasal cavity. The second endoturbinate forms the middle nasal concha. Subsequent turbinates are much smaller. The ventral nasal conchus is not formed by turbinates, but by the maxilla.
The nasal cavity is the area between the nostrils and the cribiform plate, it is divided by a septum into right and left sides. The '''nasal conchae''', also known as ethmoturbinate, are scroll-shaped bones covered with nasal mucosa that project into the nasal cavity. The first endoturbinate is the base of the dorsal nasal conchae. It extends the furthest into the nasal cavity. The second endoturbinate forms the middle nasal concha. Subsequent turbinates are much smaller. The ventral nasal conchus is not formed by turbinates, but by the maxilla.
The conchae divide the nasal cavity into three meatuses, which form a common meatus near the nasal septum.
The conchae divide the nasal cavity into three meatuses, which form a common meatus near the nasal septum.
*Dorsal nasal meatus: Between the dorsal nasal meatus and the dorsal concha. It leads directly to the nasal cavity.
*Dorsal nasal meatus: Between the dorsal nasal meatus and the dorsal concha. It leads directly to the caudal nasal cavity.
*Middle nasal meatus: Between the dorsal and ventral nasal conchae, communicates with paranasal sinuses.
*Middle nasal meatus: Between the dorsal and ventral nasal conchae, communicates with paranasal sinuses and leads into the caudal nasal cavity.
*Ventral nasal meatus: Between the floor of the nasal cavity and the ventral nasal concha. This is the main passage of airflow to the nasal cavity.
*Ventral nasal meatus: Between the floor of the nasal cavity and the ventral nasal concha. This is the largest meatus and is the main passage of airflow to the nasal cavity via the nasopharynx.
*Common nasal meatus: Either side of the nasal septum, communicates with all other meatus.
*Common nasal meatus: Either side of the nasal septum, communicates with all other meatus.