unit 8: special senses, eye (1) Flashcards
the fibrous coats of the eye are derived from the ___, while the lens, retina, choroid and pigmented layers are derived from the ___
mesoderm
ectoderm
the __ tunic is outermost, and contains the sclera & cornea
fibrous
- thick, dense, frim, opaque white part of fibrous tunic that maintains shape if pressure INSIDE eye INCREASES
- extraocular muscles attach here
sclera
tiny openings in sclera allow __ __ and __ to pass through
BV
neurons
- anteriorly, sclera transitions to the cornea at the __ and is lined with ___
- posteriorly, it is continuous w/ fibrous sheath covering CN __
limbus
conjunctiva
II
clear, transparent anterior part of fibrous tunic that is the primary REFRACTORY part of the eye, and is convex antiorly
cornea
corneal epi anterior limiting lamina substantia propria posterior limiting lamina endothelium --five layers (ANT to POST) that make up the \_\_\_
cornea
__ __, within the cornea, is continuous with the conjunctiva
corneal epi
largest part of the cornea is the __ ___
substantia propria
endothelium covers the inside surface of the cornea and lines the ___ layer
iridocorneal
the vascular tunic is made up of these three things
choroid
ciliary body
iris
part of vasc tunic that is thin with a rich blood supply, the vessels of which are heavily supplied by autonomic, vasomotor fibers and may have a coolin effect
choroid
the choroid of the vasc tunic is loosely attached to the ___, except where optic nerve penetrates, at which point it is firmly attached
sclera
the choroid of vasc tunic is __ __ in order to limit passage of light thru sclera to retina as well as thru retina to sclera
darkly pigmented
part of vasc tunic continuous w/ the choroid posteriorly and the iris anteriorly, that suspends the lens
ciliary body
ciliary body of vasc tunic produces aqueous fluid in anterior segment of eye as well as some ___ of the vitrous body
GAGs
the ciliary muscle, contained in the ciliary body, contracts to allow lens to become more ___, allowing for ___ vision
convex
near
- colored part of eye that divides the anterior segment into anterior and posterior chamber
- made up of sphincter pupillae and dilator pupillae
iris
__ __ muscle in iris contains fibers circumferentially arranged that CONSTRICT the pupil
-innervated by ____ fibers
sphincter pupillae
parasymp
- __ __ muscle in iris causes pupil to become larger when it contracts
- innervated by __ fibers
dilator pupillae
sympathetic
nervous tunic (RETINA) is an outgrowth of the ___ and is a thin layer in contact with the ___ posteriorly and the ___ body internally
diencephalon
choroid
vitreous
from external to internal:
- pigmented layer
- rods and cones
- external limiting membrane
- outer nuclear layer
- outer plexiform layer
- inner nuclear layer
- inner plexiform layer
- ganglion cell layer
- nerve fiber layer
- internal limiting membrane
retina layers
vision pathway
1) ____: rods and cones synapse with
2) inner nuclear layer, ___ cells relay info to:
3) ganglionic layer, ___ cells carry info to:
4) lateral geniculate body, ___ here form optic radiation to synapse in:
5) brodmann area __ of occipital love
photoreceptors bipolar multipolar axons 17
two retinal structures visible upon fundoscopic exam are the __ __ and __ __
optic disc
macula lutea
