Human Eye

Question 1

Sclera

Answer 1

outer white layer, maintains eye shape, attaches to muscles

Question 2

Choroid

Answer 2

contains blood vessels

Question 3

Retina

Answer 3

contains light detecting cells, converts light to electrical signals

Question 4

Aqueous humor

Answer 4

liquid, refracts light rays, maintains eye shape

Question 5

Vitreous humor

Answer 5

liquid, refracts light, maintains eye shape

Question 6

Iris

Answer 6

controls light entering eye, coloured ring

Question 7

Pupil

Answer 7

black centre of eye, hole where light enters

Question 8

Optic nerve

Answer 8

transmits messages from retina to brain

Question 9

Optic disc

Answer 9

where optic nerves converge, exit eye

Question 10

Macula lutea

Answer 10

yellow spot, rear retina, includes fovea centralis

Question 11

Fovea centralis

Answer 11

contains no rod cells, best for sharp detailed daylight vision

Question 12

Rod Cells

Answer 12

light sensitive, no colour, night vision

Question 13

Cone cells

Answer 13

colour vision, detailed vision

Question 14

Cornea

Answer 14

transparent and refracts light, in front of lens, iris

Question 15

Lens

Answer 15

refracts light, helps focus light rays

Question 16

Ciliary muscles

Answer 16

pulls choroid towards lens