Structure of eye and ear AP PYSCH

cornea

1.curved outer layer that bends light into the eye

pupil

2.a small hole that allows light in the eye

iris

3.the colorful part of the eye that controls the size of the pupil

lens

4.flexible part that changes shape to focus light into the eye, helping us see objects near and far

retina

5.light sensitive tissue. Turn light into electrical signals

blind spot

6.where the optic nerve leaves the eye. Because this area contains no receptor cells (no rods or cones), it cannot detect light or receive visual information

pinna

1.catches sound saves

ear canal

2.a tube that guides sound waves from outer ear to middle ear.

ear drum

3.thin membrane that seals outer ear from inner ear

ossicles and function of each part

4.transmit and mechanically amplify sound vibrations from the eardrum to the fluid-filled inner ear. 1.Hammer-moves when ear drum vibrates

2.anvil: receives vibration and passes on.

3.stirrup:transfers vibrations to oval window of cochlea

cochlea

fluid filled snail like tube where transduction occurs

cicilia

bends with vibration and turns sound into electrical signals(transduction)

auditory nerve

carries electrical signals to the brain