The nose is the part of the respiratory tract that sits front and center on your face. You use it to breathe air in and to stop and smell the roses.
Anatomy of Nose Bones
Bones of Nose:
The nose has a bony part that’s formed by the bony nasal septum, the nasal bones, and parts of the maxillae, palatine, and frontal bones.
Nasal Bone :
Each human has two nasal bones located in the upper-middle area of the face, between the maxillary bones' frontal processes. They are placed side by side at the middle and upper part of the face, and form, by their junction, “the bridge” of the nose.
Nasal bones are normally small and oblong, but can differ in size and shape in different people.
The function of each nasal bone is to bind together the cartilaginous tissues that form individual nose shapes.
Each nasal bone has two surfaces and four borders :
Surfaces.
The outer surface is concavoconvex from above downward, convex from side to side, and perforated about its center by a foramen, for the transmission of a small vein.
The inner surface is concave from side to side, and is traversed from above downward, by a groove for the passage of a branch of the nasociliary nerve.
Borders.
The superior border is narrow, thick, and serrated for articulation with the nasal notch of the frontal bone.
The inferior border is thin, and gives attachment to the lateral cartilage of the nose; near its middle is a notch which marks the end of the groove just referred to.
The lateral border is serrated, beveled at the expense of the inner surface above, and of the outer below, to articulate with the frontal process of the maxilla.
The medial border, thicker above than below, articulates with its fellow of the opposite side, and is prolonged behind into a vertical crest, which forms part of the nasal septum: this crest articulates, from above downward, with the spine of the frontal, the perpendicular plate of the ethmoid, and the septal cartilage of the nose.
Ossification:
Each bone is ossified from one center, which appears at the beginning of the third month of fetal life in the membrane overlying the front part of the cartilaginous nasal capsule.
Articulations:
The nasal articulates with four bones: two of the cranium, the frontal and ethmoid, and two of the face, the opposite nasal and the maxilla.
Articulation with the frontal is via the serrated superior margin. The thin lateral margin butts against the frontal process of the maxilla. The medial border meets with its fellow from the opposing side and superiorly articulates with a small portion of the perpendicular plate of the ethmoid bone. Inferiorly, the notched margin is continuous with the lateral nasal cartilage.
References :
Anatomy of the Human Body > II. Osteology > 5b. The Facial Bones. 1. The Nasal Bones.
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