choana


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Related to choana: antrochoanal polyp, Torus tubarius

choana

(ˈkəʊənə)
n
a nasal opening situated towards the back of the nasal cavity in vertebrates
References in periodicals archive ?
However, since septal deviation can occur at any point from the naris to the choana, a classification system based on only one part of the septum tends to underestimate the prevalence of deviation.
Three clays after acquisition, 10 randomly selected birds were tested for the presence of Chlamydophila psittaci DNA by swabbing the conjunctiva, choana, and cloaca of each bird and submitting the culturette to a commercial laboratory (Chlamydophila psittaci PCR test, Infectious Disease Laboratory, College of Veterinary Medicine, University of Georgia, Athens, GA, USA).
1,3-5) The nestlings of yellow-billed cuckoos have white tomia and a red mouth gape, with the presence of 5 small white papillate patches on the palate, 4 large ones along the caudal part of the choana, 2 on the tongue, and 1 large patch on its dorsal surface (Fig 2).
Endoscopic examination detected massive polyposis that obstructed the middle meatus and extended to the choana on the right side.
They extend into the choana and cause nasal obstruction and mouth breathing.
The oral cavity, including the choana, and the cloacal mucosa appeared normal.
The tumor extended to the posterior choana and postnasal space in 3 patients (33.
Computed tomography (CT) revealed that the calcified mass extended from the vestibule to the choana (figure 1).
There was also stenosis of the right choana (figure, D).