The orbit is a four-sided pyramidal bony cavity whose skeleton is contributed to several bones of the skull. The base of the pyramid is open and points anteriorly to form the orbit... The orbit is a four-sided pyramidal bony cavity whose skeleton is contributed to several bones of the skull. The base of the pyramid is open and points anteriorly to form the orbital rim. The lateral, medial, superior, and inferior walls converge posteriorly and medially to the apex. At the apex, the optic foramen is opened and transmits the optic nerve and ophthalmic artery. The orbit also has a lateral-superior depression for the lacrimal gland.
Understand the Problem
السؤال يصف التركيب التشريحي لمدار العين وبعض وظائفه. هو سؤال يتطلب معرفة علم التشريح.
Answer
The orbit is a four-sided pyramidal bony cavity formed by several skull bones including the frontal, maxilla, zygomatic, palatine, ethmoid, and sphenoid bones.
The bony structures of the orbit include contributions from multiple skull bones: the frontal bone, maxilla, zygomatic bone, palatine bone, ethmoid bone, and sphenoid bone. The orbit is shaped like a four-sided pyramidal cavity with the base forming the orbital rim.
Answer for screen readers
The bony structures of the orbit include contributions from multiple skull bones: the frontal bone, maxilla, zygomatic bone, palatine bone, ethmoid bone, and sphenoid bone. The orbit is shaped like a four-sided pyramidal cavity with the base forming the orbital rim.
More Information
The orbit is a critical structure in the skull as it houses and protects the eye and its associated structures, including nerves and muscles. The varying thickness of the walls plays a significant role in its resistance to fractures.
Tips
Sometimes, students may forget to consider the smaller bones like the palatine when identifying contributors to the orbit structure.
Sources
- Bones of the orbit: Anatomy, foramina, walls and diagram - Kenhub - kenhub.com
- The Bony Orbit - Borders - Contents - Fractures - TeachMeAnatomy - teachmeanatomy.info
