Post on 12-Nov-2014
Introduction to sensory organs
receptor
accessory organs
definiton
classification
exteroceptors
propioceptors
interoceptors (visceroceptors)
The visual organ
Function: receiving the stimulation of light, and
converting the stimulation into nerve impulse
Formation: the eyeball the accessory organs of eye
the vascular tunica (middle tunica)
the choroid
the iris
the ciliary body
Pupil:two set of smooth muscles
ciliary ring ciliary processciliary m.
the retina (inner tunic)
the pigment cells lamina
the photoreceptors
the bipolar cell
the ganglion cells
macula lutea ( yellow spot)
optic disc
Optic part contains 4 layers of cells:
1.the eyelids:
the skin
the subcutaneous areolar tissueorbicularis oculithe tarsus the conjunctive
bulbar conjunctiva
palpebral conjunctiva
conjunctival sac
sup. and inf. conjuctival fornix
2. the lacrimal apparatus
⑴ the lacrimal gland
⑵ the lacrimal passagea.the lacrimal puncta
b.the lacrimal ductule
c.the lacrimal sac
d.the nasolacrimal duct
3.the extraocular muscles
NAME FUNCTION
sup. rectus turns the eyeball superiomedially
inf. rectus turns the eyeball inferiomedially
med. rectus turns the eyeball medially
lateral rectus turns the eyeball laterally
sup. obliquus turns the eyeball inferiolaterally
inf. Obliquus turns the eyeball superiorlaterally
LevatorPalpebraesuperioris
raise the upper lid
III. The blood vessels of eye
ophthalamic a. artery:internal carotid a.
ophthalmic a.
veins: ophthalamic v.
sup. and inf. ophthalamic veins
1.the producing, functions and circuits of the aqueous humor
⑴ producing: the ciliary body
⑵ circuits:The aqueous humor post. chamber pupil
ant. chamber iridocorneal angle space of iridocorneal angle
sinus venous sclerae
a. to supply the nutrition for the cornea
b. to form the refractive media
(3)functions:
2.the producing and secreating passages of the tears
the lacrimal gland
sup. fornix
inf. fornix
the lacrimal puncta
the lacrimal ductule
the lacrimal sac
the nasolacrimal duct
the inferior nasal meatus