Page 215 - Pharmaceutics IV (02-06-01305)
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30/03/2024
a – nasal vestibule d – middle turbinate
b – palate e – superior turbinate (olfactory mucosa)
c – inferior turbinate f – nasopharynx
Dr ALyaa Ramadan, AU 5
5
The nose is the main entry to the respiratory area.
The nasal cavity is 120–140 mm deep, extends from the
nasal entrance to the nasopharynx, and is divided into two
sections by a cartilaginous wall called the nasal septum.
The nasal area has a surface area about 160 cm2,
It acts as a tool to bring warm moist air into the
lungs.
It is the first organ that filters particles in the inhaled air and
also provides a preceding immunological barrier because it
contacts the inhaled air with mucosa
Dr ALyaa Ramadan, AU 6
6
3
