Animal Anatomy: Sense Organs (Eyes & Ears)

What structure connects the middle ear to the pharynx?

eustachian tubes

What structure brings the air into the middle ear?

eustachian tubes

Name the three bones found in the middle ear and what is their main function.

stapes, malleus, and incus

Name the two muscles that help in dampening loud noises.

stapedial and tympanic

What is the difference between perilymph and endolymph?

perilymph is found between the bony and membranous labyrinth; endolymph is found within the membranous labyrinth

Which part of the inner ear is responsible for the sense of hearing?

cochlear part

Which part of the inner ear is responsible for maintaining the balance and equilibrium?

vestibular part

What is otitis externa?

inflammation of the outer ear

What is otitis media?

inflammation of the middle ear

What is otitis internal?

inflammation of the internal ear

Name the parts that comprises the fibrous layer of the eye.

cornea and sclera

Name the three parts that comprise the vascular layer of the eye.

choroid, iris, ciliary body

Which layer of the choroid is responsible for the shining of animal's eye in the dark?

innermost layer (taptetum)

Which part of the eye contains rod and cone cells?

retina

Which cranial nerve transmits the light stimulus from the eye to the brain?

optic nerve (II)

What is accommodation?

lens contraction and relaxation to focus at different distances

Name the pigmented part of the eye that controls the amount of light entering the eye.

iris

Name the fluid produced by the ciliary body in anterior chamber of eye.

aqueous humor

Name the jelly like substance found in the posterior chamber of eye.

vitreous humor

What is glaucoma?

excessive aqueous humor, causing increased pressure to the anterior chamber