Taga zuwa duniya. A jikin mutum

Ilimi na bambancin da duniya taimakawa wajen da hankula. Eyes samar mana da casa'in cikin dari na duk mai shigowa bayanai. A jikin wani mutum saboda haka kakkarfan dangankata da kwakwalwa, wanda aka ɗõra wa ɗaukar primary aiki na juyayi tsarin sadarwa tare da waje duniya. The abu don hasken-m Layer na ido ne a cikin kwakwalwa na tsarin jijiya nama. A jikin mutum ta amfani da wani gefe na image analyzer - photoreceptors. Kamar yadda shugaba na gani analyzer amfani da na gani jijiya. Wannan hadadden tsari na aiki a kan babban juzu'in tsakiya, wanda aka mayar da hankali a gani yanki a cikin occipital lobe na cerebral bawo.

Da yake jawabi na gabobin da hangen nesa, mu sau da yawa wakiltar wadanda abubuwa da suke waje. Da farko, a biyu daga eyeballs (idanu) da kuma jikinsu da yin karin ayyuka. Wadannan sun hada da eyelids, girare, gashin idanu, lacrimal gland shine yake da ocular tsokoki. A lids ne fata folds, suka iyakance ido da tsaguwa da aka rufe idan ya cancanta. A ciki surface daga cikin karni ne mucous membrane cewa ophthalmologists masana kira da conjunctiva. Babban aiki na karni ne lubrication na hawaye ruwa na ido, kazalika da kare surface daga bushewa da kuma inji tsoma. Kullum wani mutum ya aikata Ƙibtawa da zarar ta biyar seconds.

Pride of wani kyakkyawa - gashin idanu - suna located a gefuna da eyelids, suna shirya a 2-3 layuka, su yawan kai tamanin. Sun yi wani m aiki, Gargaxi lamba tare da ido mucosa waje barbashi. A babbar rawar a tabbatar da al'ada aiki na ido taka lacrimal gland shine yake. An located a kan waje a cikin sama kusurwa na ido. Ita kullum da kuma ci gaba da haifar da wani musamman m - slozu. Daily girma ya kai 100 ml. Kyakketa ta cikin nasolacrimal bututu ci gaba drains cikin hanci kogo. Chemically hawaye wakiltar wani 1.5 bisa dari bayani da na kowa gishiri (NaCl), wanda ya hada da wani germicidal wakili (lysozyme). Yaga dama ayyuka. By wanke surface na eyeball, ta hydration da kuma kariya daga kasashen waje barbashi da kuma kwayoyin kara Ya aiki abu samfurin juyayi tashin hankali da kuma wani tunanin danniya.

Na mutum gabobin ne a akai motsi. Domin matsar da eyeballs hadu da ido tsokoki. A cikin arsenal na mutum ido, akwai hudu Lines da kuma biyu daga QFontDatabase tsokoki. Su shigarwa na tabbatar da synchronous aiki na gani da gatura da kowane ido, sabõda haka sũ, converge a kan abu, wanda aka dauke.

A eyeball ne halitta mai siffar zobe ruwan tabarau wanda diamita kai biyu da rabi santimita. Ta uku-iyakance membrane. Kira fibrous m (Tunica), da talakawan samu jijiyoyin bugun gini sunan da ciki sunan wani photosensitive (akan tantanin ido).

A jikin wani mutum ne mai hadaddun halitta inji, wanda ga al'ada aiki na bukatar m magani. Kamar yadda mutum Sistem gabobin, da idanu yin su aiki tare da daya kawai bambancin da cewa sun dauki kadan sauran a kan mutum barci, amma su aiki ba kare, amma kawai ta zama mafi "aiyukan yanayin".

Ga al'ada aiki, ido tilas ne a bi da kiwon lafiya na gani aiki. Wadannan sun hada da rabuwa da aiki lokaci zuwa load da kuma gajeren lokaci na interruptions. A hadaddun na darussan da damar ba kawai don horar da sautin tsokoki na ido, amma kuma dattako da ruwan tabarau aiki da kuma ga jijiya tafiyar matakai.

Kula da nasu hangen nesan zai tabbatar da cewa kana da wani dogon lokaci za su iya cikakken ji dadin launuka iri-iri na duniya kewaye da mu.