neuron yang dibagi menjadi tiga goups fungsional menggunakan , yaitu sel-sel fotoreseptor ( sel batang dan sel kerucut ) , sel-sel afferens serat lewat di saraf optik , dan sekelompok neuron sela antara dua pertama jenis yang mengintegrasikan neuron dibagi lagi menjadi tiga ketik : sel bipolar , sel hortzonatal , dan sel amacrine .

lapisan luar

kornea adalah lima lapisan struktur sonsisting vaskular of permukaan luar dilapisi oleh bertingkat non keratin squamouse ephitelium . epitel terletak pada lamina basal tipis didukung oleh lapisan khusus stroma kornea sebagai membran pemanah itu . sebagian besar kornea , propria substantia atau stroma og fonn sangat reguler jaringan kolagen padat membentuk lamellae tipis.

the inner surface of the cornea is lined a layer of flattened endotelial cells which are supported by a very thick elastic basement membrane known as descements membrane.

The choroid is a leyer of loose vascular sopporting tissue lying between the sclera externally and retina internally. The ciliary body is lined by a double layer of cuboidal epithelium. The structure of ciliary body is loose connective tissue rich in elastic fiber, vessel surrounding the ciliary body and form a diphragma in fornt the uveal layer of the eye. It arises from the ciliary body and form a dipragma in front of the lens, so dividing the anterior compartment of the eye into posterior and anterior chamber. The anterior surface of the iris is formed by a discountinous layer of pigmen cells and fibroblast. The posterior surface is relatively smooth and is lined by a double layer of cuboid epithelium.

The cochlea s the component of the internal ear which contein te auditory sense organ. The coclear canal can be seen to be devide into three componens, shown at higher magnification in micrograph.

- The central compartment, the scala media is roughly triangular in cross section.

- Above the scala media is scala vestibuli.- Below the scala media is the perilymphatic space which spinal down

from the apex to the secondary typanic membran, the scala tympani.

The mebraneseparating the scala media and the scala tymphani, know as the basilar membrane shieh contains the auditory receptor cells. The basilar membran is compous of fibrous tissue. Axially, it is attached to the osseus spiral ligament. The thickened outer wall of the scala media is highly vascular and lined by a stratified epitheium this are knows as the stria vascularis. The mebran between the scala media and scala vestibul, the vestibular (reissner’s) membrane is compoused of extremely delicated fibrous tissue is lined by simple squamous epithelium on both sides. Bundle of afferent nerve can be seen arising from the base of the organ of

corti and corverging towards the spinal ganglion in the mediolus at the base of the spiral lamina.

The organ of corti is highly specialised epithelial structure containing reseptor cells. The organ of corti consists of two basic types of cells, sensory ( hatr ) cells and support cells of several different types, including among other, the inner and outer pillar cells and inner and outer phalangeal cells, border cells, cells of henses.

The several different types of cell can not be seen under the light microscope. The sensory cells are knows hair cells because numerous sterocilia. The stereocilia are embedded in the surface of the tektorial membrane. The tektorial membrane is a flap like mass of gycosaminoglycans.

Integument commune is devided into 3 layer, which are epidermis, dermis ( corium ) and subcutis ( hypodermis ).Epidermis is devide into 4 or 5 layer, which are stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. Stratum lucidum only found in the epidermis of the palm and soles.Dermis is devide into 2 layer, which are stratum paillare and stratum reticulare.

Stratum papillare is part of the dermis ( corium ) that contains dermal papillae ( palilla corii ). These papillae project into the base of epidermis. In these papillae found venules, arterioles, capillary loops and nerve consist of collagen that woven together ( rete = net ), blood vessels and some cells.

Hypodermis ( subcutis ) is a loose connective tissue containing fat cell as adipose tissue. In this layer found nerve ending called corpuscium lamellosum vater pacini ( pressure receptore ), that has slicedonion appearance.