Orbit (anatomy)

In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated.

It can also mean the skin which surrounds the eye of a bird.

Contents

 * Extraocular muscles
 * Nerves: cranial nerves II, III, IV, V, and VI
 * Blood vessels
 * Fat

Bones
In humans, seven bones make up the bony orbit:
 * 1) Frontal bone
 * 2) Zygomatic bone
 * 3) Maxillary bone
 * 4) Sphenoid bone
 * 5) Ethmoid bone
 * 6) Palatine bone
 * 7) Lacrimal bone

Foramina and openings

 * 1) Optic foramen
 * 2) Superior orbital fissure
 * 3) Inferior orbital fissure
 * 4) Anterior ethmoid foramen
 * 5) Posterior ethmoidal foramen
 * 6) Infraorbital foramen
 * 7) Supraorbital foramen
 * 8) Naso-lacrimal canal opening
 * 9) Zygomatic orbital foramen