the senses Flashcards
sense and organ
touch-skin
taste-tongue
smell-nasal cavity
sight-eye
conjuntivia
the membrane around the eye and protects sclera
sclera
tough white coat that holds the eye in shape
choroid
nourishes the eye and has melanin to absorb light
retina
contains rods and cones ,light receptors and is light sensitive
fovea
region of sharpest focus has cones only
blind spot
where optic nerve leaves retina, not sensitive to light and has no rods or cones
lens
changes shape to focus light on the retina
ciliary muscle
causes lens to change shape
iris
controls the amount of light entering the eye. the colored part of the eye
pupil
let’s light into the eye-opening in the iris
aqueous humor
holds front of the eye in shape
vitreous humor
supports the eye
optic nerve
carries impulses to the brain
cones
cells in the retina that see colour
rods
cells in the retina that see in black and white
PINNA
collects vibrations and channels them into the auditory canal
AUDITORY CANAL
carries vibrations to the eardrum
EARDRUM
separates the outer ear from the inner ear
ossicles
hammer, anvil, and stirrup(smallest bone in the body)
transmit vibrations from outer to inner ear and amplify vibrations
eustachian tube
equalizes pressure on either side of the eardrum
cochlea
responsible for hearing
converts vibrations into electrical impulses that are sent to the brain along the auditory canal
semi-circular canal
controls balance
organ of corti
in the cochlea and contains receptor cells that allow hearing
disorder and cause
glue ear
stick fluid collecting in the middle ear due to overproduction
symptoms and treatment
deafness
decongestive nose drops
grommets are inserted
