Changes

- ''Dorsal'': the maxilla and the palatine processes of the [[Skull and Facial Muscles - Anatomy & Physiology#Incisive Bone (os incisivium)|incisive bone]]

- ''Dorsal'': the maxilla and the palatine processes of the [[Skull and Facial Muscles - Anatomy & Physiology#Incisive Bone (os incisivium)|incisive bone]]

*Rostrally, the median septum is a continuation of the ethmoid bone. The median septum is made up of hyaline cartilage, and divides the nasal cavity into left and right halves.

*Rostrally, the median septum is a continuation of the [[Skull and Facial Muscles - Anatomy & Physiology#Ethmoid Bone (os ethmoidale)|ethmoid bone]]. The median septum is made up of [[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|hyaline cartilage]], and divides the nasal cavity into left and right halves.

[[Image:DogHeadDissection.jpg|right|thumb|200px|The nasal cavity can be seen filled with conchae in this photograph of a canine head. ©Nottingham 2008]]

[[Image:DogHeadDissection.jpg|right|thumb|200px|The nasal cavity can be seen filled with conchae in this photograph of a canine head. ©Nottingham 2008]]

*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 [[Special Senses - Olfactory - Anatomy & Physiology|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 [[Skull and Facial Muscles - Anatomy & Physiology#Ethmoid Bone (os ethmoidale)|ethmoid bone]] and attaching to the maxilla, and the vental conchae originating from the [[Skull and Facial Muscles - Anatomy & Physiology#Maxilla|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 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: