MEDRADSC 2H03 Lecture 16: 2RA3: Facial Bones

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 2H03
• Professor: Alana Trainor

Document Summary

2 nasal bones: 2 lacrimal bones, 2 palatine bones, 2 maxilla, 2 zygoma, 2 inferior nasal conchae, 1 vomer, 1 mandible. Nasal bones: articulate with, frontal, ethmoid, opposite nasal bone, maxilla. Lacrimal bone: posterior to nasal and maxilla, on medial wall of orbit. Lacrimal groove: junction between lacrimal bone and maxillae: accommodates the lacrimal sac. Lacrimal gland sits in the orbital surface in a fossa. Lacrimal sac: part of the drainage route for tears, upper end of nasolacrimal duct. L-shaped: forms posterior of hard palate, hard palate formed by horizontal portion, extend vertically to form part of nasal cavity, forms roof of mouth and part of floor of orbit, consists of horizontal and perpendicular plates. Upper jaw, parts of orbital and nasal cavities + anterior of the hard palate. Fuse at the midline to form a pointed process (anterior nasal spine)