Eye Anatomy

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Questions and Answers

What type of membrane covers the deep surface of the eyelids?

Synovial membrane

Mucous membrane (correct)

Epimysial membrane

Epithelial membrane

What covers the superficial surface of the eyelids?

Muscle tissue

Mucous membrane

Skin (correct)

Epithelial tissue

What is the name of the membrane that covers the deep surface of the eyelids?

Sclera

Epithelium

Cornea

Conjunctiva (correct)

What is the function of the conjunctiva in the eye?

To protect the eye from infection Signup and view all the answers

What is the relationship between the skin and the conjunctiva in the eyelids?

The skin covers the superficial surface and the conjunctiva covers the deep surface Signup and view all the answers

Through which opening do tears enter the canaliculi lacrimales?

Puncta lacrimalis Signup and view all the answers

What is the function of the canaliculi lacrimales?

To drain tears from the eye Signup and view all the answers

Where do tears circulate before entering the canaliculi lacrimales?

Across the cornea Signup and view all the answers

What is the name of the tiny opening that tears flow through to enter the nasolacrimal duct?

Punctum Signup and view all the answers

What is the pathway of tears from the eye to the nose?

Lacrimal gland → Canaliculi lacrimales → Puncta lacrimalis → Nasolacrimal duct Signup and view all the answers

The lacrimal fold is a type of:

Mucous membrane Signup and view all the answers

Where does the nasolacrimal duct open?

Inferior meatus of the nose Signup and view all the answers

What is the function of the lacrimal fold?

To guard the opening of the nasolacrimal duct Signup and view all the answers

The nasolacrimal duct is located in which type of canal?

Bony canal Signup and view all the answers

What is the direction of the nasolacrimal duct?

Downward and outward Signup and view all the answers

What is the location of the inferior orbital fissure?

Posteriorly between the maxilla and the greater wing of the sphenoid Signup and view all the answers

What structure does the inferior orbital fissure communicate with?

Pterygopalatine fossa Signup and view all the answers

Which of the following bones forms the inferior orbital fissure?

Maxilla Signup and view all the answers

What is the relationship between the inferior orbital fissure and the orbit?

It is a gap in the orbital floor Signup and view all the answers

Which of the following statements about the inferior orbital fissure is TRUE?

It is a gap in the bony orbit Signup and view all the answers

What is the origin of the ophthalmic artery?

Internal carotid artery Signup and view all the answers

Which of the following arteries is closely related to the ophthalmic artery?

Internal carotid artery Signup and view all the answers

What is the primary function of the ophthalmic artery?

To supply blood to the orbit Signup and view all the answers

Which of the following structures is NOT supplied by the ophthalmic artery?

Cerebral cortex Signup and view all the answers

What is the relationship between the ophthalmic artery and the internal carotid artery?

The ophthalmic artery is a branch of the internal carotid artery Signup and view all the answers

Study Notes

Eyelid Structure

The superficial surface of the eyelids is covered by skin.
The deep surface of the eyelids is covered by a mucous membrane called the conjunctiva.

Lacrimal Ducts

Tears circulate across the cornea and enter the canaliculi lacrimales through the puncta lacrimalis.
The lacrimal duct descends downward in a bony canal and opens into the inferior meatus of the nose.
The opening of the lacrimal duct is guarded by a fold of mucous membrane known as the lacrimal fold.

Bony Orbits

The inferior orbital fissure is located posteriorly between the maxilla and the greater wing of the sphenoid.
The inferior orbital fissure communicates with the pterygopalatine fossa.

Blood and Lymph Vessels of the Orbit

Ophthalmic Artery

The ophthalmic artery is a branch of the internal carotid artery.

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Description

Learn about the structure of the eyelids, lacrimal ducts, and their functions in the human eye.