Iris. Features ya kapangidwe ka m'diso la munthu

The Iris ndi gawo zapambuyo wa choroid lapansi. Ndi woonda kwambiri zotumphukira chigawo izo. Iye ciliary (ciliary) thupi ndi choroid   ndi zigawo zitatu zazikulu za mundawo mtima, kupangidwa mu miyezi inayi mpaka isanu chitukuko yoopsa.

Iris The aumbike padziko sabata chakhumi ndi chisanu ndi chiwiri mu malo m'mphepete mwa otchedwa chikho chamawonedwe ndi "superposition" wa mesoderm lapansi. Ndi mwezi wachisanu ndi Iris sphincter aumbike - minofu udindo kuchepa mu kukula mwana. Patapita kumeneko dilator. Ichi ndi minofu mkati lomwe kenako adzapereka kutambasuka kwa. Chifukwa cha mogwirizana zogwirizana ndi coherent pakati pa sphincter ndi dilator Iris zakulera amachita ntchito kuti bwino nthawi otaya wa ozama kuwala mtengo. Mwa mwezi wa chisanu athanzi kumbuyo pigmentary zaminyewa minofu. Pomaliza mapangidwe ndondomeko zofunika dongosolo.

Zichitike mwachindunji kukhudzana ndi diso wa Iris wa diso anthu sakutero. Pakati pa izo ndi mpanda kunja kusiya malo kakang'ono - chipinda kutsogolo wodzala ndi amadzimadzi (chipinda) ndi chinyontho.

Iris obweretsa ali mawonekedwe a mbale yozungulira ndi awiri a pafupifupi khumi millimeters ndi kukafika kutsogolo kwa pafupifupi zaka sate-eyiti millimeters. Pa malo ake ndi kutsegula zozungulira imene kuwala likulowerera - kamwana. Zinali iye amene ntchito malangizo kuchuluka kwa cheza kulowa diso. Kamwana kukula zimadalira mlingo wa zowunikira. Kuzungulira mtengo ang'onoang'ono kwambiri, adzakhala awiri ake. Mtengo wake avareji za zitatu millimeters. Pa nthawi yomweyo achinyamata mwana m'mimba mwake ndi zambiri zikuluzikulu pang'ono kuposa okalamba. Izi anafotokoza chifukwa chakuti pa nthawi pali manja a dilator ndi sphincter fibrosis.

The katundu waukulu maso amafotokozera monga Iris, ndi mtundu, chitsanzo, boma la mwana kabowo ndi malo wachibale nyumba zina diso. Onse a iwo amayamba ndi zina zokhudza anatomical dongosolo lake.

Wosanjikiza kutsogolo ali radiarnoy Iris striation, amene amaupereka ngati zingwe mpumulo. Kukulitsa ndi kudula-mtundu ili minofu yake connective, wotchedwa lacunae. Zikuzimiririka pang'onopang'ono theka millimeter kufanana pupillary m'mphepete, ili bryzhzhi (pinion). Iwo kugawa Iris m'zigawo ziwiri: kunja (ciliary) ndipo mkati - pupillary. grooves concentric anafotokozedwa m'dera woyamba. Iwo chotsatira chenicheni cha kuchepetsa ndi kuwongola wa Iris pa kayendedwe ake.

Kumbuyo kutsogolo choroid anapambulwa ankaimira dilator ndi pigment ake ndi zigawo malire. Choyamba pa pupillary m'mphepete ndipamene felemu kapena mphonje. Front Front Iris limapangidwa ndi Iris stroma ndi akunja wosanjikiza malire.