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Skull and Facial Muscles - Anatomy & Physiology (view source)
Revision as of 13:35, 30 July 2008
, 13:35, 30 July 2008no edit summary
===Nasal Bone (os nasale)===
===Nasal Bone (os nasale)===
*Paired
*Forms the roof of the nasal cavity
*Dorsal nasal conchae attach to the ethmoidal crest on the internal surface
*Rostral suture form the apex
*Between the nasal and incisive bones is the nasoincisive notch
===Lacrimal Bone (os lacrimale)===
===Lacrimal Bone (os lacrimale)===
*Forms part of the lateral wall of the face and orbit
*Situated near the medial canthus
*It articulates with the frontal bone, zygomatic bone and maxilla
**Also articulates with the nasal bone in ruminants and the horse
**Also articulates with the palatine bone in carnivores
*Composed of an orbital and facial part separated by supra- and infraorbital margins
*The nasolacrimal duct is present by the margin of the orbital surface
*Ventral oblique muscle attaches caudal to the margin of the orbital surface
*Nasal surface forms the boundaries of the maxillary and frontal sinuses
===Zygomatic Bone (os zygomaticum)===
===Zygomatic Bone (os zygomaticum)===
*Lateral and ventral to the lacrimal bone
*Forms the orbit and zygomatic arch
*Supraorbital margin formed by the zygomatic process of the temporal bone and the frontal process of the zygomatic bone
*Facial crest present on lateral surface
===Incisive Bone (os incisivium)===
===Incisive Bone (os incisivium)===
*Paired
*Composed of body, nasal, palatine and alveolar parts
*Joins with the maxilla to form the interalveolar margin
*Forms the rostral part of the facial section of the skull, the roof of the [[Hard Palate - Anatomy & Physiolgy|hard palate]] and the opening to the nasal cavity
*The alveolar process form conical sockets for the incisor teeth
===Palatine Bone (os palatinum)===
===Palatine Bone (os palatinum)===