17 Sense Organa: Eye/Ear Vocab

Question 1

anterior chamber

Answer 1

behind the cornea in front of the lens and iris, contains aqueous humor

Question 2

aqueous humor

Answer 2

fluid produced by ciliary body and found in the ant chamber

Question 3

biconvex

Answer 3

consisting of two surfaces that are rounded, elevated, and curved evenly. the lens is biconvex

Question 4

choroid

Answer 4

middle, vascular layer of the eye, between retina and sclera

Question 5

ciliary body

Answer 5

structure surrounding the lens that connects the choroid and iris, has ciliary muscles which shape the lens and secretes aqueous humor

Question 6

cone

Answer 6

photoreceptor cell in the retina that transforms light energy into a nerve impulse, responsible for color and central vision

Question 7

conjunctiva

Answer 7

delicate membrane lining the under surface of the eyelids and covering the ant eyeball

Question 8

cornea

Answer 8

fibrous transparent layer of clear tissue that extends over the ant portion of the eyeball

Question 9

fovea centralis

Answer 9

tiny pit or depression in the retina that is the region of clearest vision

Question 10

fundus of the eye

Answer 10

posterior, inner part of the eye

Question 11

iris

Answer 11

pigmented layer that opens and closes to allow more or less light into the eye

Question 12

lens

Answer 12

transparent, biconvex body behind the pupil. it refracts light rays to bring them into focus on the reinta

Question 13

macula

Answer 13

yellowish region on the retina lateral to and slightly below the optic disc; contains the fovea centralis which is the area of clearest vision

Question 14

optic chiasm

Answer 14

point at which the optic nerve fibers cross in the brain

Question 15

optic disc

Answer 15

region at the back of the eye where the optic nerve meets the retina, blind spot because it only contains nerve fibers, no rods or cones- insensitive to light

Question 16

optic nerve

Answer 16

cranial nerve carrying impulses from the retina to the brain

Question 17

pupil

Answer 17

central opening of the eye, surrounded by the iris, through which light rays pass

Question 18

retina

Answer 18

light-sensitive nerve cell layer of the eye containing photoreceptor cells (rods and cones)

Question 19

rod

Answer 19

photoreceptor cell of the retina essential for vision in dim light and for peripheral vision

Question 20

sclera

Answer 20

though, white outer coat of the eyeball

Question 21

thalamus

Answer 21

relay center of the brain, optic nerve fibers pass through here on their way to the cerebral cortex

Question 22

vitreous humor

Answer 22

soft, jelly-like material behind the lens in the vitrous chamber, helps maintain shape

Question 23

refraction

Answer 23

bending of light rays by cornea, lens, and fluid to bring rays into focus on the retina

Question 24

auditory meatus

Answer 24

auditory canal

Question 25

auditory nerve fibers

Answer 25

compose the vesitibulocochlear nerve

Question 26

auditory tube

Answer 26

eustachian tube

Question 27

auricle

Answer 27

flap of the ear, pinna

Question 28

cerumen

Answer 28

earwax

Question 29

cochlea

Answer 29

contains hearing sensitive receptor cells

Question 30

endolymph

Answer 30

fluid within the labyrinth of the inner ear

Question 31

incus

Answer 31

2nd ossicle (bone) of middle ear, anvil

Question 32

labyrinth

Answer 32

cochlea, vestibule, and semicircular canals

Question 33

malleus

Answer 33

1st ossicle, hammer

Question 34

organ of corti

Answer 34

sensitive auditory receptor area found in the cochlea of the inner ear

Question 35

ossicle

Answer 35

small bone of ear

Question 36

oval window

Answer 36

membrane between the middle ear and the inner ear

Question 37

perilymph

Answer 37

fluid contained in the labyrinth of the inner ear

Question 38

semicircular canals

Answer 38

passages in the inner ear associated with maintaining equilibrium

Question 39

stapes

Answer 39

3rd ossicle, stirrup

Question 40

tympanic membrane

Answer 40

membrane between outer and middle ear, eadrum

Question 41

vestibule

Answer 41

central cavity of the labyrinth, connects semicircular canals and the cochlea, contains the saccule and utricle which help maintain equilibrium