ABSTRACT
The function of the nose is filtration and conditioning of inspired air and olfaction. This chapter outlines the anatomy of the nasal cavity, nasal septum, lateral nasal wall and paranasal sinuses. The external nose is discussed in Chapter 3. The close proximity of the orbit and cranial cavity means that catastrophic complications can occur if there is a lack of clear and detailed knowledge the anatomy. A thorough knowledge of the anatomy of the internal nose and paranasal sinuses and an appreciation of the possible variations in these structures is paramount for effective and safe endoscopic sinus surgery.
