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==Introduction==

==Introduction==

The respiratory tract begins with the ''nose'' which includes the external nose, internal nasal cavities and [[Paranasal sinuses - Anatomy & Physiology|paranasal sinuses]].

The respiratory tract begins with the ''nose'' which includes the external nose, internal nasal cavities and [[Paranasal Sinuses - Anatomy & Physiology|paranasal sinuses]].

As well as being vital for transport of gases to the [[Cardiorespiratory System Overview - Anatomy & Physiology#Lower Respiratory Tract|lower respiratory tract]], the nasal cavity is also the site for one of the special senses - [[Nose - Anatomy & Physiology|''Olfaction'']].

As well as being vital for transport of gases to the [[Cardiorespiratory System Overview - Anatomy & Physiology#Lower Respiratory Tract|lower respiratory tract]], the nasal cavity is also the site for one of the special senses - [[Nose - Anatomy & Physiology|''Olfaction'']].

*The nose consists of the external nares with nasal [[Bones and Cartilage - Anatomy & Physiology#Structure and Function of Cartilage|cartilages]], the nasal cavity (including the nasal meatus and conchae), and the [[Paranasal sinuses - Anatomy & Physiology|paranasal sinuses]].

*The nose consists of the external nares with nasal [[Bones and Cartilage - Anatomy & Physiology#Structure and Function of Cartilage|cartilages]], the nasal cavity (including the nasal meatus and conchae), and the [[Paranasal Sinuses - Anatomy & Physiology|paranasal sinuses]].

*The nasal cavity is essentially a tube with a wall established by several [[Skull and Facial Muscles - Anatomy & Physiology#Bones of the Skull|bones of the skull]]. The borders of the nasal cavity are as follows:

*The nasal cavity is essentially a tube with a wall established by several [[Skull and Facial Muscles - Anatomy & Physiology#Bones of the Skull|bones of the skull]]. The borders of the nasal cavity are as follows:

- '''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  

- '''Middle nasal meatus''': between the dorsal and ventral conchae, and communicates with the [[Paranasal sinuses - Anatomy & Physiology|paranasal sinuses]].

- '''Middle nasal meatus''': between the dorsal and ventral conchae, and communicates with the [[Paranasal Sinuses - Anatomy & Physiology|paranasal sinuses]].

- '''Ventral nasal meatus''': the main pathway for airflow leading to the pharynx, and is positioned between the ventral nasal concha and the floor of the nasal cavity.

- '''Ventral nasal meatus''': the main pathway for airflow leading to the pharynx, and is positioned between the ventral nasal concha and the floor of the nasal cavity.

- '''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 - Anatomy & Physiology|Paranasal Sinuses]] are extensions of the nasal cavity.

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

==Function==

==Function==