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