What is a Coani?

1. What is the purpose of choana?
2. What are bones that form Choanae?
3. Where is the Choanae located?
4. What are the nasal Choanae?
5. How does Antrochoanal polyp grows posteriorly?
6. What is the nasal Conchae?
7. What is Choanae in English?
8. Is Concha and turbinate same?
9. What is nasal Choanae quizlet?
10. What is the role does mucus in the nasal cavity?
11. What are 3 functions of the nasal cavity?
12. Is Choanal atresia life threatening?
13. What is Epitaxis?
14. How common is antrochoanal polyp?
15. Why is it called antrochoanal polyp?
16. How is antrochoanal polyp treated?

What is the purpose of choana?

They are considered one of the most important synapomorphies of sarcopterygians, that allowed the passage from water to land. In animals with secondary palates, they allow breathing when the mouth is closed. In tetrapods without secondary palates their function relates primarily to olfaction (sense of smell).

What are bones that form Choanae?

Choana is a space bounded as follows: anteriorly and inferiorly by the horizontal plate of palatine bone, superiorly and posteriorly by the sphenoid bone laterally by the medial pterygoid plates.

Where is the Choanae located?

The Choanae are the posterior nasal aperture, separated by the vomer. It is the opening between the nasal cavity and the nasopharynx.

What are the nasal Choanae?

The nasal choanae are paired openings that connect the nasal cavity with the nasopharynx. Choanal atresia is a congenital condition in which these openings are occluded by membranous soft tissue, bone, or a combination of both due to failed recanalization of the nasal fossae during fetal development.

How does Antrochoanal polyp grows posteriorly?

Antrochoanal polyp is a benign lesion originating from the mucosa of the maxillary sinus, growing through the accessory ostium into the middle meatus and, thereafter, protruding posteriorly to the choana and nasopharynx. Incomplete excision of antrochoanal polyp almost always leads to recurrence.

What is the nasal Conchae?

nasal concha, also called Turbinate, or Turbinal, any of several thin, scroll-shaped bony elements forming the upper chambers of the nasal cavities. They increase the surface area of these cavities, thus providing for rapid warming and humidification of air as it passes to the lungs.

What is Choanae in English?

choana in British English

(ˈkəʊənə) anatomy. a nasal opening situated towards the back of the nasal cavity in vertebrates.

Is Concha and turbinate same?

Within the nasal cavity, there are three separate turbinates: superior, middle, and inferior. Turbinates are also called concha. Because the nasal cavity is symmetrical, there are technically pairs of turbinates, leading to 6 in total for an average human. These structures are on the lateral nasal wall.

What is nasal Choanae quizlet?

The choanae is a passageway at the back of the nasal cavity proper that empties into the nasopharynx and also forms an outflow from the nasopharynx to the mouth and throat.

What is the role does mucus in the nasal cavity?

The mucus traps smaller particles like pollen or smoke. Hairlike structures called cilia line the mucous membrane and move the particles trapped in the mucus out of the nose. Inhaled air is moistened, warmed, and cleansed by the tissue that lines the nasal cavity.

What are 3 functions of the nasal cavity?

The nasal cavity functions to humidify, warm, filter, and act as a conduit for inspired air, as well as protect the respiratory tract through the use of the mucociliary system. The nasal cavity also houses the receptors responsible for olfaction.

Is Choanal atresia life threatening?

Bilateral choanal atresia is life-threatening and symptoms appear immediately after birth. Babies breathe only through their noses when they are very young, so the blocked nasal passages will cause extreme difficulty breathing.

What is Epitaxis?

A nosebleed is bleeding from tissues inside the nose (nasal mucus membranes) caused by a broken blood vessel. The medical word for nosebleed is epistaxis. Most nosebleeds in children occur in the front part of the nose close to the nostrils. This part of the nose has many tiny blood vessels.

How common is antrochoanal polyp?

The antrochoanal polyp is an inflammatory nasal polyp found more frequently in children than adults. It represents up to 42% of all nasal polyps in children and 4-6% in adults.

Why is it called antrochoanal polyp?

Antrochoanal polyp, which is also known as “Killian's polyp” is a benign solitary lesion with a mucin density. It arises from the antrum of the maxillary sinus and passes through the sinus ostium into the nasal cavity, choana and goes downwards into the nasopharynx.

How is antrochoanal polyp treated?

The current treatment of antrochoanal polyp is simple avulsion of the nasal part with or without removal of the antral part. The antral part is removed through a Caldwell- Luc antrostomy, inferior meatal antrostomy, or middle meatal antrostomy.