chapter 10 Flashcards
parts of the eye
- iris
- vitreous body
- cornea
- aqueous humor
- retina
- conjunctiva
- optic nerve
- lens
- sclera
- optic disk
- lacrimal ducts
- rods and cones
- choroid
governs the size of the pupil
iris
- soft and jelly-like
- shapes the eye
vitreous body
clear portion of the sclera that covers the anterior of the eye
cornea
- watery fluid
- maintains corneas
- constantly produced and drained
aqueous humor
- deepest layer of the tunic
- is the eyes actual receptor layer
- contains photoreceptors
retina
- lines the inner surface of the eyelids
- folds back to cover the visible portion of the white of the eye
conjunctiva
- carries visual impulses from retina to brain
optic nerve
- adjusts to help focus the light
lens
- the whites of the eye
- the fibrous tunic
- the outermost tunic
sclera
- no images form in retina yet
- known as the blind spot
optic disk
helps drain tears made by lacrimal glands
lacrimal ducts
- in your retina
- light sensitive cells
- generate nerve impulses
rods and cones
- middle tunic
- vascular
- contains melanin
choroid
parts of the ear
- ossicles
- pinna or auricle
- eustachian tube
- cochlea
- tympanic membrane
- malleus
- incus
- stapes
- vestibular
- semicircular canals
- Organ of Corti
3 small bones in the middle ear
ossicles
visible and its external portion of the ear
pinna or auricle
connects the middle ear cavity and pharynx
eustachian tube
coil like snail shell in the inner ear and contains organ of hearing (corti)
cochlea
separates outer ear from the middle ear
tympanic membrane
- first bone (ossicle) of the ear
- in contact with eardrum
- hammer shaped
malleus
- shaped live anvil
- helps amplify sound
incus
- innermost ossicle
- in contact with the oval window of the inner ear
- shaped like a stirrup
stapes
- consists of 2 chambers
- contain receptors for equilibrium
vestibular
- areas for receptors for equilibrium
- 3 tubes
semicircular canals
- long strip of hair cells
- known as spiral organ
Organ of Corti
the special senses
- taste
- smell
- sight
- equilibrium
the general senses
- touch
- pressure
- temperature
- position
- pain
neurons embedded in the epithelium of the nasal cavity’s superior region; neurons react with smell chemicals; involved with sense of smell
Olfactory epithelium
parts of the tongue and which area are sensitive to sweet, sour, salty, bitter, and umami
- located on a mainly superior surface on tongue
- enclosed on rained projections called papillae
the function of the Vestibularcochlea nerve and what cranial nerve is it
- Cranial nerve 8
- receptors for equilibrium
- balance
- transmits sensory information for balance
- from inner ear to brain
the purpose of analgesics
relieve pain by blocking the sensation of pain within the body; more of a pain control
sensory adaptation
the way the body adjusts to different stimuli
oto-
ear
opthalmo-
eye
scope-
instrument to examine
propri/o
own
esthesia
sensation
alges/i
pain
the 4 structures that protect the eyes and describe the contribution of each
- skull
- eyelid and eyebrow
- tears
- conjunctiva
skull (eye orbit)
- protects eye
- bony orbit protects the posterior portion
eyelid and eyebrow
- protects the anterior portion of the eye
- keeps foreign substances out of eye
tears
lubricates eye
conjunctiva
lines eyelids and part of sclera
