The Senses Flashcards
Conjunctiva
Thin membrane protecting the sclera
Cornea
Transparent tissue that let’s light through
Pupil
Opening in the iris that let’s light in
Lens
Changes shape to focus light on the retina
Iris
Controls the amount of light entering the eye
Ciliary muscles
Changes the thickness of the lens
Sclera
White opaque part of the eye
Choroid
Dark coloured layer containing bloodvessels to nourish the eye
Retina
Where the light receptors are located
Fovea
Where most images are focused
Blind spot
Where there are no rods or cones
Optic nerve
Carries impulses to your brain
Vitreous humour
A viscous fluid that supports the eyeball
External muscles
Moves the eye
Aqueous humour
Solt solution that holds the front of the eyenin shape
Vestibular apparatus
Detects balance
Rods
120 million in the eye, detect black and white light, found all over the retina
Cones
6 million per eye, detects colours, found mostly in the fovea
Long sisghteness
Unable to see things far away, convex lenses
Short sight
Unable to see clearly unless they are close to the eye, concave lenses
Pinna
It helps collect and channel vibrations into the auditory canal
Auditory canal
Carries vibrations to the eardrum
Eardrum
Tightly stretches membrane and vibrates as a result of vibrations that reach it
Hammer, anvil and stirrup
Transmit vibrations from the outer ear to the inner ear
