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Ocular Anatomy quiz #1 > Conjunctiva > Flashcards

Conjunctiva Flashcards

1
Q

what is the conjunctival sac

A

a potential space between the bulbar and palpebral conjunctiva

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2
Q

what is the conjunctiva

A

a thin, transparent, mucus membrane, lines the inner surface of the eyelids

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3
Q

what are the three regions of the conjunctiva

A

bulbar, forniceal (cul-de-sac) and palpebral

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4
Q

what are the two layers of the palpebral conjunctiva

A

nonkeratinized stratified squamous epithelium and stratified columnar epithelium

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5
Q

where is the nonkeratinized stratified squamous epithelium located

A

near the mucocutaneous juntion

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6
Q

where is the stratified columnar epithelium located

A

the posterior surface of the lid

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7
Q

where is the source of stem cells for the epithelium of the palpebral conjunctiva

A

the mucocutaneous junction

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8
Q

what does the stratified columnar epithelium contain

A

goblet cells that produce the mucus layer of the tear film

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9
Q

what is the substantia propria

A

the connective tissue the epithelium of the palpebral conjunctiva rests on

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10
Q

what is the forniceal conjunctiva

A

a transitional area between the palpebral and bulbar conjuntiva

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11
Q

why is the substantia propria loose in the fornices

A

permits accumulation of fluid during infection (edema)

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12
Q

what cells are found in the substantia propria

A

lymphocytes and plasma cells

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13
Q

where does the bulbar conjunctiva attach with the epithelium of the cornea

A

1mm anterior to the corneoscleral limbus

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14
Q

what is the plica semilunaris

A

cresent-shaped fold of conjunctiva, sits lateral and under the caruncle

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15
Q

what is the caruncle

A

a small mound of tissue in the lacus lacrimalis, contains accessory glands

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16
Q

What is the histology of the conjunctiva at the limbus

A

stratified squamous epithelium (continues as the corneal epithelium)

17
Q

what is on the apical surface of the conjuctival epithelium

A

microvilli and microplicae, covered with glycocalyx

18
Q

what cell is the most numerous in the inferonasal conjunctiva

A

goblet cells

19
Q

what is the conjunctival submucosa

A

fine delicate connective tissue, superficial layer are the most lymphocytes

20
Q

where does the blood supply come from for the palpebral conjunctiva

A

two palpebral arches in each eyelid (marginal and peripheral)

21
Q

what is the blood supply to the forniceal conjunctiva

A

the peripheral arcade

22
Q

what supplies the bulbar conjunctiva with blood

A

the peripheral arcade continues under the bulbar conjunctiva turning into the posterior conjunctival arteries

23
Q

what becomes red and inflamed in a disease of the cornea

A

the superficial pericorneal plexus

24
Q

what becomes red and inflamed in a disease of the iris or ciliary body

A

the deep periconrneal episcleral plexus (they are deeper than the superficial pericorneal plexus)

25
Q

what sensory innervates the bulbar conjunctiva

A

long ciliary nerves from the nasociliary nerve of the ophthalmic branch of the trigeminal nerve

26
Q

what sensory innervates the superior fornix and the superior palpebral conjunctiva

A

from lateral to medial: lacrimal, supraorbital, supratrochlear branches of the ophthalmic branch of the trigeminal nerve

27
Q

what innervates the inferior fornix and inferior palepbral conjunctiva

A

lacrimal branch of the ophthalmic (trigeminal)

28
Q

what innervates the medial portion of the inferior palpebral conjunctiva

A

the infraorbital branch of the maxillary division of the trigeminal nerve

29
Q

where does the lateral conjunctiva lymph drain

A

into the parotid (preauricular) lymph nodes

30
Q

where does the medial conjunctiva lymph drain

A

into the submandibular lymph nodes

Ocular Anatomy quiz #1 (8 decks)

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