Orbit (anatomy)

（重定向自Orbital cavity）

The seven bones that form the orbit:yellow = Frontal bonegreen = Lacrimal bonebrown = Ethmoid boneblue = Zygomatic bonepurple = Maxillary boneaqua = Palatine bonered = Sphenoid boneteal = Nasal bone (illustrated but not part of the orbit)

Tear system:a. tear gland / lacrimal gland,b. superior lacrimal punctum,c. superior lacrimal canal,d. tear sac / lacrimal sac,e. inferior lacrimal punctum,f. inferior lacrimal canal,g. nasolacrimal canal

In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, or it can also be used to imply the contents. In the adult human, the volume of the orbit is 30 mL, of which the eye occupies 6.5 mL. The orbital contents comprise the eye, the orbital and retrobulbar fascia, extraocular muscles, cranial nerves II, III, IV, V, and VI, blood vessels, fat, the lacrimal gland with its sac and nasolacrimal duct, the eyelids, medial and lateral palpebral ligaments, check ligaments, the suspensory ligament, septum, ciliary ganglion and short ciliary nerves.

单词	Orbital cavity
释义	Orbital cavity 英语百科 Orbit (anatomy) （重定向自Orbital cavity） In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, or it can also be used to imply the contents. In the adult human, the volume of the orbit is 30 mL, of which the eye occupies 6.5 mL. The orbital contents comprise the eye, the orbital and retrobulbar fascia, extraocular muscles, cranial nerves II, III, IV, V, and VI, blood vessels, fat, the lacrimal gland with its sac and nasolacrimal duct, the eyelids, medial and lateral palpebral ligaments, check ligaments, the suspensory ligament, septum, ciliary ganglion and short ciliary nerves.
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