The interactive dog atlas · Skeleton · Head

Nasal bone os nasale

The nasal bones are the two long bones on the bridge of the nose, which make the ceiling of the nasal cavity.

Educational material, not a diagnostic tool. Written by the Mantrailing România team from veterinary sources we read. Updated 14.11.2026.

Dog in left lateral view — exterior, muscles, skeleton and organs Vector study after the Ellenberger, Baum and Dittrich plates: a standing dog, head to the left, deep chest and digitigrade limbs. The four layers use the same contour: exterior with body regions, superficial muscles, skeleton and organs.
  1. Nasal bone
  2. Incisive bone
  3. Maxilla
  4. Frontal bone
  5. Skull
Nasal bone on the atlas drawing, "Skeleton" layer, with the neighbouring structures. Left lateral view, after the Ellenberger, Baum and Dittrich plates.

Where it is

The roof of the nasal cavity, on the bridge of the nose; paired.

System
Axial skeleton
Region
Head

What it is and what it does

The nasal bones, paired, form the upper part of the roof of the nasal cavity. They articulate with each other on the midline, laterally with the maxillae and caudally with the frontal bone. In the dog, in most breeds, they are long and wider in front, their rostral ends form an almost semicircular nasal notch, and their outer surface has a central groove. The front part of the dorsal nasal concha attaches to them.

Worth remembering

Their length sets the length of the muzzle: short in brachycephalic breeds, long in sighthounds.

Names

  • Latin term: os nasale.
  • In Romanian: Osul nazal (Romanian page).

In the atlas lessons

The head: what you see, what is underneath (6 min):

Switch to “Skeleton”: the nasal bone forms the roof of the nose, the maxilla carries the upper teeth, the incisive bone holds the incisors, the frontal bone hides the frontal sinus.

Questions from the atlas

"Find it on the drawing" questions whose answer is this structure; in the atlas you will find them in the question bank and in the lessons.

Guides it appears in