Anatomy Of The Nose And Its Structural Adaptation

Anatomy of Nose and Paranasal SinusThe NoseThe nose consists of the external nose and the nasal cavity, Both are divided by a septum into right and left halves.External NoseThe external nose has two elliptical orifices called the naris (nostrils), which are separated from each other by the nasal septum. The lateral margin, the ala nasi, is rounded and mobile.External NoseExternal NoseThe framework of the external nose is made up above by the nasal bones, the frontal processes of the maxillae, and the nasal part of the frontal bone. Below, the framework is formed of plates of hyaline cartilageExternal NoseBlood Supply of the External NoseThe skin of the external nose is supplied by branches of the ophthalmic and the maxillary arteries.The skin of the ala and the lower part of the septum are supplied by branches from the facial artery.Nerve Supply of the External NoseThe infratrochlearand external nasal branches of the ophthalmic nerve (CN V) and the infraorbitalbranch of the maxillary nerve (CN V).Nasal CavityThe nasal cavity has-a floor, -a roof, -a lateral wall, -a medial or septalwall.The Floor of Nasal Cavity Palatine process maxillaHorizontal plate palatine boneThe Roof of Nasal Cavity NarrowIt is formed -anteriorly beneath the bridge of the