The Eye

Question 1

Eyelid

Answer 1

-lubrication
-a moveable structure that offers protection

Question 2

Cornea

Answer 2

-controls and focuses the entry of light into the eye
-made up of cellular and acellular components

Question 3

Sclera

Answer 3

-supporting wall of the eyeball
-helps maintain shape and protects it from injury
-covered in conjunctiva

Question 4

Retina

Answer 4

-captures the light that enters the eye and helps translate it into the images we see
-layered structure with distinct layers of neurons interconnected by synapses

Question 5

Choroid

Answer 5

-a dense network of blood vessels and pigmented stoma between the retina and he sclera

Question 6

Iris

Answer 6

-supplies the outer retina with nutrients
-maintains temp and volume of the eye
-controls how much light the pupil lets in

Question 7

Pupil

Answer 7

-allows light to enter the eye so it can be focused on the retina to begin the process of sight
-round and black

Question 8

Lens

Answer 8

-to transmit and focus the light onto the retina in order to create clear images of observed objects at various distances

Question 9

Ciliary body

Answer 9

-produces fluid in the eye called the aqueous humour
-circular structure that is an extension of the iris

Question 10

Vitreous humour

Answer 10

-transparent, colourless, gel-like substance that fills the space between the lens and the retina
-maintains the round shape of the eye
-also can help with vision clarity

Question 11

Aqueous humour

Answer 11

-fluid produced by the ciliary body
-provides nutrition as well as maintains the eye in a pressurised state

Question 12

Forea

Answer 12

-responsible for sharpe central vision
-located in the centre of the macula lurea, a small flat spot

Question 13

Optic disc

Answer 13

-sends all visual data to the brain
-pinks to orange in colour, a vertical oval shape

Question 14

Optic nerve

Answer 14

-transmits sensory information for vision in the form of electrical impulses from the eye to the brain

Question 15

How animals see in the dark..

Answer 15

-eye size is as big as their brain to gather as much light as possible
-gleaming eyes to detect photons eg cats
-tapetum lucidium reflects back as much light as possible to see (reflective layer at the back of the eye)
-larger and more amount of rods
-predators have binocular vision and peripheral vision
-prey also have peripheral vision but monocular vision