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
