Vet Tech Ch 14

Correct one

What is the ocular system responsible for?

Vision

The combining forms for the eye or sight:

opt/i, opt/o, optic/o, ocul/o, and
ophthalm/o

The accessory structures of the eye:

• Orbit

• Eye muscles

• eyelids or palpebrae (Belphar/o)

The transparent anterior portion of the eyeball:

is known as the cornea.

Sclera:

Outter layer

Choroid:

The middle layer of the eye containing blood vessels, iris, pupils, lens, and ciliary body

Retina:

Inner layer, nervous tissue layer that receives images

Anterior segment contains _ _

Aqueous humor

Vitreous chamber contains _ _

Vitreous humor

Accommodation:

Adjustment for distance

Refraction:

Focusing

Convergence:

Maintenance of binocular vision

Acuity:

Sharpness

The ear is a sensory organ that enables hearing and helps to maintain balance. what are the combining forms for ear?

audit/o, aud/i, and ot/o

What are the combining forms for sound or hearing?

acoust/o and acous/o

Pinna

Catches and then transmit sound waves.

External auditory canal

Tube that transmits sound from the pinna to the tympanic membrane. (glands secrete cerumen here)

auditory ossicles

malleus, incus, and stapes

Tympanic membrane (eardrum)

Transmits sound waves to the ossicles

Eustachian tube

equalizes air and middle ear pressure

Tympanic bulla

osseous chamber that houses the middle ear

Describe the process of vision

Light enters through cornea → lens → retina → optic nerve → brain.

Cochlea

The organ of hearing

What initiates a nerve impulse in the inner ear?

Hair cell stimulation in the organ of Corti.

What is dynamic equilibrium and where is it controlled?

Balance during movement; controlled by semicircular canals.

What is static equilibrium and where is it controlled?

Balance while stationary; controlled by the vestibule.