Unit 4: Understanding Ears and Eyes Flashcards
Name the sections of the eye:
Aqueous humour Cornea Pupil Lens Iris Conjunctiva Ciliary muscle Suspensory Ligament Retina Optic nerve Macular
What is the pupil?
The opening in the middle of the eye through which light passes
What does the Iris do?
Adjusts to control the amount of light entering through the pupil
What do tear glands do?
Produce tears to lubricate the eye and defend against infections
What does aqueous humour do?
Jelly like fluid that fills the eye. Keeps the eye’s shape and nourishes it.
What does the conjunctiva do?
A thin membrane that protects the cornea
What does the retina do?
Inner lining of the eye. Receives the light/images.
What is the macula?
The part of the retina that receives sharp images.
What does the optic nerve do?
The images are sent to the brain via this
What does the ciliary muscle do?
Enables the lense to stretch and squash to focus the light
What are suspensory ligaments?
Attach the lens to the ciliary muscle
What does the lens do?
Focuses the light entering the eye
Name the parts of the ear:
Ear drum Incus malleus stapes semi circular canals auditory nerve cochlea oval window round window eustachian tube
What is the ear drum?
Thin layer of tissue that receives sound vibrations and transmits them to the middle ear cavity
What do the stapes, incus and malleus do?
Small bones that amplify the sound waves and transmit the vibrations across the middle ear to the cochlea
