XVII - Organs of Special Senses Flashcards Preview

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Flashcards in XVII - Organs of Special Senses Deck (97)
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1

First and most powerful structure of the optical system

cornea

2

Center of vision

fovea

3

Enable the lens to change its shape

zonula

4

Middle vascular layer of the eye

uvea

5

film of the eye

retina

6

Area of the eye without sensory cells

optic disk

7

First part of the brain to receive visual input

optic chiasm

8

Relay station of the visual cortex

lateral geniculate body

9

Keeps images focused on the retina

lens

10

Layer of blood vessel that supplies blood to the retina

choroid

11

Produces aqueous humor

ciliary body

12

Blocked in glaucoma

canal of Schlemm

13

Lens: highly elastic basement membrane covered by a single layer of cuboidal cells, thickest near the equator, thinnest posteriorly

capsule

14

Lens: forms the bulk of the lens, composed of long thin tightly packed cells who lost their nuclei and form fibers

cortex/fiber

15

Cornea: stratified non-keratinizing squamous, 5-6 layers, exposed to air, one of the richest sensory nerve supplies of any eye tissue

epithelium

16

Cornea: composed of collagen fibers, acellular, contributes greatly to the stability and strength of the cornea

Bowman's membrane

17

Cornea: thickest layer, collagen type III and IV, avascular

stroma

18

Cornea: basement membrane

Descemet's membrane

19

Cornea: simple squamous, exposed to aqueous humor, responsible for metabolic exchanges

endothelium

20

Retina: not photosensitive

anterior

21

Retina: photosensitive, optical part

posterior

22

Retina: contains photosensitive cells (rods & cones)

outer layer

23

Retina: contains bipolar neurons

intermediate layer

24

Retina: contains ganglion cells

internal layer

25

Retina: where the retina converges to form the optic nerve

optic disk (optic nerve head, papilla of the optic nerve

26

Retina: blind spot

optic disk

27

Retina: oval-shaped highly pigmented yellow spot near the center of the retina

macula

28

Retina: area of highest visual acuity

fovea

29

Retina: small pit in the center of the macula, contains the highest concentration of cone cells

fovea

30

Retina: separates the retina from the vitreous humor

inner limiting membrane