eye

Question 1

sclera

Answer 1

connective tissue

white part of eye

Question 2

cornea

Answer 2

transparent

light passes through

Question 3

ciliary body (2)

Answer 3

ciliary muscle - band of smooth muscle, contraction/relaxation to allow fibers to move
ciliary process - folds of capillaries that secrete aqueous humour

Question 4

Zonula fibers

Answer 4

suspensory ligaments
attach to lens and ciliary body
change shape of lens

Question 5

iris

Answer 5

coloured part
flattened
suspended between lens and cornea
attached to ciliary process
made of melanocytes and smooth muscle
melanin determines eye colour (more - brown, less - blue, moderate - green)

Question 6

retina

Answer 6

visual pathway
2 layers - neuronal layer from brain -> optic nerve
- photoreceptors

Question 7

photoreceptors

Answer 7

cones - 3 types, blue, red, green, lose these and legally blind
rods - dim light, lose these and can’t see in dim light

Question 8

optic disc

Answer 8

where optic nerve comes in

blind spot

Question 9

what comes in with the optic nerve

Answer 9

central retinal artery and vein

Question 10

macula lutea

Answer 10

exact centre of posterior retina

Question 11

fovea centralis

Answer 11

depression in retina
under macula lutea
contains only cones
max image seen here (cones clearer)

Question 12

vitreous humour

Answer 12

fluid in main part of eye
doesn’t undergo continuous replacement
water, collagen fibers, phagocytic cells

Question 13

aqueous humour

Answer 13

fluid between lens and cornea
nutrients for lens/cornea because they lack blood supply
formed by capillary network in ciliary body (posterior to anterior to blood stream)
drains into canal of Schlemm
eventually enters systemic bloodstream