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The bridge of the nose
Superiorly each bone articulates with the frontal bone
laterally with frontal process of the maxilla
The cartilage of the external nose is attached to its inferior
In the midline the two bones project backwards and formed
part of the septum of the nose.
On the inner surface of each bone there is a longitudinal
groove in which run the anterior ethmoidal vessels and
They pass on to the external surface of the nose between
the bone and cartilage as the external nasal vessels and
median bone, which forms the
postero-inferior part of the nasal
Posteriorly its upper margin is flattened to form two alae,
which articulate with the inferior surface of the body of the
sphenoid bone.
Its smooth posterior margin forms the free edge of the septum.
Inferiorly it articulates with the bones of the hard palate
antero-superiorly with the perpendicular plate of the
ethmoid bone and the septal cartilage
a thin plate of bone on the lower part of the lateral wall of
the nasal cavity
It projects medially and then downwards enclosing the
inferior meatus.
Its upper lateral edge is attached, in front, to a ridge on
the maxilla and behind to a ridge on the palatine bone.
The middle part of the bone has three processes:
1st process passing upwards, which close in the lower
part of the nasolacrimal duct
2nd process, which articulates with the ethmoid bone.
3rd process, between these
articulates with the maxilla.
All these processes reduce the size of the opening of
the maxillary sinus.