Special Senses 👁️👂🏾
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22 Terms
What part of the eye controls how much light enters?(controls pupil size)
Iris
What part of the eye focuses light onto the retina?
Lens
What is the function of the retina?
It detects light and sends signals to the brain (via the optic nerve).
What is the clear front layer of the eye called?
Cornea
What fluid fills the space between the cornea and lens?
Aqueous humor
What nerve carries visual info to the brain?
optic nerve (cranial nerve II)
What part of the retina sees the sharpest detail?
fovea centralis
What is the blind spot of the eye?
optic disc(where the optic nerve exits).
What structure opens and closes to let light in?
pupil
What cells in the retina detect color?
cones
What cells in the retina detect light and dark (no color)?
rods
Where are cones most concentrated in the eye?
fovea centralis
Do rods or cones give sharp, clear vision?
cones
What are the three parts of the ear?
external ear, middle ear, internal ear
What collects sound waves?
The auricle (pinna)
What part vibrates when sound hits it?
The tympanic membrane (eardrum)
What are the tiny bones in the middle ear called?
Ossicles — malleus, incus, stapes.
What connects the ear to the throat and helps with pressure?
Eustachian tube
What part of the ear helps with hearing?
The cochlea
What part of the ear helps with balance?
semicircular canals
What cranial nerve carries hearing and balance signals to the brain?
Vestibulocochlear nerve (cranial nerve VIII)
Which part of the cochlea contains hair cells that detect sound?
The organ of Corti