Iwindo riri munyika. Nhengo dzevanhu dzechiono

Ivo ruzivo rwekusiyana-siyana kwenyika yakapoteredza inoshandiswa nemanzwi. Maziso anopa isu makumi mapfumbamwe kubva muzana yezvenye zveruzivo. Nhengo dzemaonero evanhu dzakanyatsobatana neuropi dzavakapiwa basa rinokosha rekubatanidzwa kwenheyo yenyika pamwe nenyika dzakapoteredza. Zvinyorwa zvemufananidzo wechisohenesi weziso ndeyekunyengera kwehutano. Nhengo dzevanhu dzechiono dzinoshandisa chikamu chepakati chechifananidzo analyzer - photoreceptors. Somutungamiri, uyo anoona shanduro anoshandisa mutsara we optic. Zvose izvi zvakaoma zvinoshandiswa panharaunda, iyo inowanikwa munzvimbo inoonekwa, mulopitalital lobe ye cortex yechebral hemispheres.

Kutaura nezvenhengo dzemaonero, isu kazhinji tinomirira zvinhu izvo zviri kunze. Chokutanga pane zvose, iviri yeziso (meso) uye nhengo dzinoita mabasa anobatsira. Izvi zvinosanganisira maziso, mashizha, eyelashes, mavara ecrimal uye maziso eziso. Maziso ari mapepa, vanogadzirisa maziso evha uye vanovhara kana zvichifanira. Pakati mukati mukati mezana remakore pane mucous membrane, iyo nyanzvi-ophthalmologists inodana conjunctiva. Basa guru rekunyengedza kwekunyanya ndiko kubwinya kwemaziso eziso nemvura inosvimha misodzi, pamwe nekuchengetedzwa kwemukoko kubva pakumisa nekugadzirisa maitiro. Mune hutano huripo, munhu anononoka pazvikamu zvemaminitsi mashanu.

Kuzvikudza kwekunaka kupi zvako-eyelashes - iri kumativi emakumbo emaoko, iyo inorongwa mumitsetse 2-3, nhamba yavo inosvika makumi masere. Vanoita basa rekudzivirirwa, vachiraira pamusoro pe ingress yekunze kune dzimwe nyika muchikamu chemukati. Gland rinonyadzisa rinoita basa rakakura pakuona kushanda kwemaziso. Iyo iri kunze kwekona yepamusoro yeziso. Anogara achiita uye anoramba achibudisa chakavanzika chinokosha-misodzi. Zuva rezuva rega rinosvika 100 ml. Kuputika mumvura kunoputika mumvura. Chemhemikari, kubvarura ndeye 1.5 muzana yehuwandu hwemafurafura munyu (NaCl), iyo ine bhakitiriya (lysozyme). Dombo rinoita mabasa akawanda. Kushambidza pamusoro peziso reziso, kuidzikisa nekudzivirira kubva kumabhakitiriya uye kune dzimwe nyika, basa rekubvisa zvinhu, chibereko chekutambudzika kwekutya uye kushungurudzika mupfungwa kunowedzerwa.

Nhengo dzemaonero evanhu dziri mukufamba nguva dzose. Nokuti kufambisa kwemaziso eziso kunosangana nemisungo yeziso. Muchikwata cheziso revanhu pane zvina zvakananga uye maviri emisungo yeiblique. Basa ravo rekufananidza rinogonesa kuiswa kwezvinhu zvinoonekwa zveziso rimwe nerimwe, kuitira kuti vashandure pane nyaya iri kuongororwa.

Ziso rezhenje ndeyendarira yakasvibirira yepanyama, iyo yakareba iyo inosvika masendimita maviri nehafu. Iyo inongororerwa kune matatu mabhomba. Kunze kunonzi fibrous (mutsvuku), avhareji ainzi vascular, uye mukati inonzi chiedza-sensitive (retina).

Nhengo dzemaonero evanhu dzakaoma zvakasikwa zvakasikwa zvinoda kurapwa kwakanaka kwekushanda. Kungofanana nehutachiona hwevanhu, maziso anoita basa ravo nemusiyano wega wekuti vanozorora zvishomanana apo munhu akarara, asi kushanda kwavo hakumire, asi kunongopinda mune imwe "hupfumi hwehurumende".

Nokuda kwekushanda kwemaziso, iwe unofanirwa kuomerera kuhutano hwebasa rinoonekwa. Izvi zvinosanganisira kupatsanurwa kwekushanda nguva kuita basa rokutakura uye nguva dzenguva shomanana. Chigadziro chekudzidzira chakave chichigadzirirwa izvo zvinobvumira kwete kungodzidzisa uye kugadzirisa maziso emeso, asiwo kugadzirisa lens uye nzira yekutya kwematambudziko.

Kuchengeta iwe pachako chiratidzo kuchava chivimbo chokuti iwe uchakwanisa kunyatsogutsikana zvakasiyana-siyana zvemavara enyika inotitenderedza kwenguva refu.