SENSES Flashcards
accessory structures of the eyes
extrinsic eye muscles
eyelids
conjunctiva
lacrimal appraratus
space between eyelids in an open eye
palpebral fissure
modified sebaceous glands in eyelid ridges; produce oily secretion (Lubricates eye)
tarsal glands
modified sweat glands (between eyelashes)
ciliary glands
membrane; lines eyelids covers outer surface of eyeball
conjunctiva
consist lacrimal glands & ducts that drain lacrimal secretion
lacrimal apparatus
they release dilute salt solution / tears
lacrimal glands
enzymes that destroys bacteria; cleanse and protects the eye
lysozyme
elevates eye & turns it medially :
depresses eye & turns it medially:
Superior
Inferior
rectus
elevates eye ; turns it laterally
depresses eye; turns it laterally
Inferior
superior
oblique
outermost layer of eyeball
fibrous layer
middle layer
vascular layer
innermost layer
sensory layer
supplied in nerve endings; only tissue in body that can be transplanted
cornea
thick white connective tissue
sclera
blood rich tunic contains dark pigment; prevents light scattering inside the eye
choroid
2 smooth muscle structures formed by choroid
ciliary body
iris
circularly and radially arranged smooth muscle form the
iris
are where optic nerve leaves eyeball; no photoreceptors
optic disc
they act as phagocytes to remove dead receptor cells
retina
allows us to see in gray tones; dim light
rods
purple pigment found in rods
rhodopsin
densest; allows us to see color under light conditions
cones
tiny pit contains only cones; greatest visual acuity
fovea centralis
flexible bioconvex crystal like structure
lens
loss of lens transparency
cataracts