Changes

*The nasal cavity is occupied to a large extent by '''''Nasal conchae'''''. These are turbinate bones which project into the nasal cavity with the purpose of supporting the olfactory mucus membranes and increasing the respiratory surface area, creating turbulence within the passing air. This helps to filtrate and warm or cool the air that passes through.  

*The nasal cavity is occupied to a large extent by '''''Nasal conchae'''''. These are turbinate bones which project into the nasal cavity with the purpose of supporting the olfactory mucus membranes and increasing the respiratory surface area, creating turbulence within the passing air. This helps to filtrate and warm or cool the air that passes through.  

The Conchae are cartilagenous or ossified scrolls which arise from the ''ethmoid bone''. They are covered with mucous membrane, under which is a layer of anastomosing blood vessels.

*The Conchae are cartilagenous or ossified scrolls which arise from the ''ethmoid bone''. They are covered with mucous membrane, under which is a layer of anastomosing blood vessels.

The nasal conchae are more complex in animals with a better sense of smell, as they increase the surface area further.

The nasal conchae are more complex in animals with a better sense of smell, as they increase the surface area further.

*There are dorsal and ventral conchae, the dorsal concha originating from the ethmoidal bone and attaching to the maxilla, and the vental conchae originating from the maxilla and extending further into the nasal cavity.

*There are dorsal and ventral conchae, the dorsal concha originating from the ethmoidal bone and attaching to the maxilla, and the vental conchae originating from the maxilla and extending further into the nasal cavity.

 

*The conchae divide the nasal cavity into nasal ducts or ''meatuses'', which branch out from a common nasal meatus which is adjacent to the nasal septum. There are three nasal meatuses which branch from the common nasal meatus: dorsal, middle and ventral:

*The conchae divide the nasal cavity into meatuses, which branch out from a common nasal meatus which is adjacent to the nasal septum. There are three nasal meatuses which branch from the common nasal meatus: dorsal, middle and ventral:

- '''Dorsal nasal meatus''': the passage between the roof of the nasal cavity and the dorsal nasal concha  

- '''Dorsal nasal meatus''': the passage between the roof of the nasal cavity and the dorsal nasal concha  

- '''Common nasal meatus''': the longitudinal space on either side of the nasal septum

- '''Common nasal meatus''': the longitudinal space on either side of the nasal septum

*The paranasal sinuses are extensions of the nasal cavity.

*The [[Paranasal Sinuses - Anatomy & Physiology|Paranasal Sinuses]] are extensions of the nasal cavity.

 

 

==Function==

==Function==