3 Conjunctiva

Question 1

What is a thin, translucent mucous membrane that runs from the limbus, over the anterior sclera, forms a cul-de-sac at the superior and inferior fornices, and turns anteriorly to line the eyelids?

Answer 1

Conjunctiva

Question 2

Three functions of the conjunctiva:

Ensures smooth movement of _____ over the globe

Helps lubricate the eye by producing _____ and ____. Produces smaller amount than lacrimal gland

Contributes to _________ _______ and helps prevent microbes from entering the eye

Answer 2

Eyelids

Mucous and tears

Immune system

Question 3

What additional cells present in the conjunctival epithelium? (4)

Answer 3

Melanocytes
T cells
B cells
Lymphocytes

Question 4

The conjunctiva consists of non-keratinized __________ and __________ with interspersed goblet cells

Answer 4

Stratified squamous and stratified columnar epithelium

Question 5

List the conjunctival segments in order from posterior to anterior:

Answer 5

Conjunctival fornix (most posterior)

Bulbar conjunctiva

Palpebral conjunctiva (or tarsal conjunctiva) most anterior

Question 6

What conjunctival segment is the tissue that lines the eyelids?

Answer 6

Palpebral conjunctiva or tarsal conjunctiva

Question 7

What conjunctival segment covers the sclera?

Answer 7

Bulbar conjunctiva

Question 8

What conjunctival segment is the ‘cup-de-sac’ connecting palpebral and bulbar sections?

Answer 8

Conjunctival fornix

Question 9

What are the 4 conjunctival fornices?

Which one is deepest? Most shallow?

Purpose?

Answer 9

Superiorly, inferiorly, laterally, medially

Lateral is deepest and extends posterior to equator of globe 14mm
Medial is shortest about 7mm

Ease movement of globe without creating undue stretching of the conjunctiva

Question 10

At what junction of the lid margin is there nonkeratinized squamous palpebral conjunctival epithelium that’s continuous with the keratinized squamous epithelium of the epidermis of the eyelid….fuck that’s a bad question

Answer 10

Mucocutanous junction

Question 11

What part of the conjunctiva is translucent? It allows sclera to show through and is loosely adherent within 3mm of cornea, where it becomes TIGHTLY adherent with tenon’s capsule and sclera

Answer 11

Bulbar conjunctiva

Question 12

What is the Plicae semilunaris?

Where’s it found?

What comprises it?

Function?

Answer 12

What? a crescent-shaped fold of conjunctiva

Where? located at the medial canthus

Composition?The epithelium is 8 to 10 cells thick and contains numerous
goblet cells, and the stroma is highly vascularized, containing smooth
muscle fibers and adipose tissue.

Function? allow full lateral movement of the eye without tissue
stretching

Question 13

What’s a subdivision of the conjunctiva that’s a mound of tissue that overlies the medial edge of the plica semilunaris?

What does it contain?

Answer 13

Caruncle

Non keratinized epithelium and accessory lacrimal glands. Also has hair follicles, sebaceous, and sweat glands….weird AF

Question 14

Describe the blood supply of the palpebral conjunctiva

Answer 14

from the palpebral arcades of the lids. They

anastomose with each other on both sides of the tarsal plate.

Question 15

Describe blood supply of fornices for conjunctiva

Answer 15

Branches from the palpebral arcades extend into the

fornices of the lid.

Question 16

Describe the blood supply of bulbar conjunctiva

Answer 16

The palpebral arcades branch yet again to
create tertiary branches that extend into the bulbar conjunctiva and
anastomose with the anterior conjunctival arteries of the anterior
ciliary arteries.

Question 17

The lymphatics of conjunctiva:

Vessels from lateral aspect empty into the ____________

Those from the medal aspect empty into the ___________

Answer 17

Parotid lymph node

Submandibular lymph node

Question 18

What innervates the bulbar conjunctiva?

Answer 18

LONG CILIARY NERVES

Question 19

What innervates the superior palpebral conjunctiva? What about the inferior?

Answer 19

Frontal and lacrimal branches of ophthalmic nerve (V1)

Lacrimal nerve and infraorbital branch of maxillary nerve

ALL SENSORY IS FROM CN V (V1 & V2)

Question 20

What’s any inflammation of the conjunctiva and is caused by a variety of factors?

Answer 20

Conjunctivitis

Question 21

What is located below the conjunctival stroma and serves as a facial cavity where the globe can move? Protects and supports the globe and attaches it to the orbital connective tissue.

Answer 21

Tenon’s capsule