From the profile, which nose structure lies at a right angle to the upper lip?

From the profile, which nose structure lies at a right angle to the upper lip?

• A. Ala nasi
• B. Septum nasi
• C. Columna Nasi
• D. Dorsum nasi

Answer: (C)

In profile view, the nasal anatomy that sits vertically between the nostrils and extends downward is the columna nasi. This nasal columella forms a line that is effectively perpendicular to the plane of the upper lip, so it appears to stand at a right angle to the lip in side view. The other structures have different orientations: the alae nasi are the side walls and sit laterally around the nostrils; the septum nasi is the internal partition between the nostrils; and the dorsum nasi is the nasal bridge along the top of the nose. Therefore, the columna nasi is the structure that lies at a right angle to the upper lip in profile.

In profile view, the nasal anatomy that sits vertically between the nostrils and extends downward is the columna nasi. This nasal columella forms a line that is effectively perpendicular to the plane of the upper lip, so it appears to stand at a right angle to the lip in side view. The other structures have different orientations: the alae nasi are the side walls and sit laterally around the nostrils; the septum nasi is the internal partition between the nostrils; and the dorsum nasi is the nasal bridge along the top of the nose. Therefore, the columna nasi is the structure that lies at a right angle to the upper lip in profile.