Inhlanzi iphoqa amanzi ngamagundane abo, idlule imithwalo eminingi yegazi emincane. I-gill ithatha i- oxygen emanzini bese ivumela amanzi ukuba asuse i-carbon dioxide. Gill filaments yiyona ingxenye ebomvu, enomzimba wegill; zihlukaniswa kakhulu kunazo zonke zegill futhi zithatha umoya-mpilo zibe egazini. I-filament ngayinye inezinkulungwane zamagatsha amahle adluliselwa emanzini . Amagatsha aqukethe i-epithelium encane ehlukanisa emanzini, okwenza i-oxygen ne-carbon dioxide idlule kalula.
Akuzona zonke izinhlanzi ezithembele ngokuphelele ekuguleni kwazo ukuze ziphefumule. Ezinye izinhlobo zithatha ingxenye enkulu ye-oksijeni yazo edingekayo esikhumbeni, ikakhulukazi uma ziyizinkulungwane. Abanye banamaphaphu aphefumulelwe ukuphefumula emoyeni empeleni azomile uma engenawo amanzi.
I-Gill Filaments
Izindleko ezinhlanzi zifana namaphaphu kubantu: yilungu elibhekene nokukhipha i-oxygen nokuqeda imfucuza ye-carbon dioxide. Ama-gill abuye alawule amazinga we-ions kanye ne-pH yegazi.
Ama-gill filaments we-bony fish abizwa ngokuthi "lamellae oyinhloko." Ziyizakhiwo eziyinkimbinkimbi ezinendawo enkulu. Ama-lamellae amancane amancane ama-offshoots ama-filaments oyinhloko. I-lamellae yesibili iqukethe ama-capillary amancane egazi kanye negazi eligeleza ngaphesheya kwamanzi. Ngenxa yalokho, amanzi ageleza eceleni kwe-lamella yesibili ahlale enokuhlushwa okwe-oksijeni okwedlula ukwedlula egazini okwenziwe i-oksijeni kangaka ngokugcwele ubude be-lamellae yesibili.
Inhlanzi yokudoba esebenzayo inezinhlamvu ze-gill ezithuthukisiwe kakhulu ukuze zithuthukise oksijini. Inhlanzi encane esebenzayo ehlala phansi iphinda ibe nama-gill filaments athola amanani amancane.
Gill Arches
Iningi lezinhlanzi zinama-gill arches. Lezi zisekela izigulane futhi ziyi-bony futhi zifakwe njenge-boomerang.
I-arch ngayinye ye-gill inomlenze ophezulu nangaphansi ohlangene ngemuva. Gill filaments kanye gill rakers kufakwe emagcekeni wegill.
Ama-arch arill anikezela ukwesekwa kwegill kanye nemithambo yegazi. Imishanguzo efaka izigulana iletha igazi nge-oksijini ephansi kanye ne-concentration ephakeme yamadaka. Imishanguzo ephuma emigqumeni iqukethe igazi elinemfucumfucu encane egcwele oksijini.
I-Gill Rakers
I-Gill rakers yizibuko zebony ezisiza izinhlanzi zondla. Bakhomba phambili nangaphakathi ukusuka emagcekeni e-gill. Inombolo kanye nokuma kwazo kubhekisela ekudleni kwezinhlanzi: Izinhlanzi ezidliwayo ezidlayo ezinkulu zifana nenye inhlanzi, ezivimbela into edlawayo ukuthi ingabikho mahhala futhi ibaleke phakathi kwezigqoko.
Inombolo enkulu kakhulu ye-rakers eyigugu, eyinde isikhathi eside ibonakala ezinhlanzi ezidla inyamazane encane. Izinhlobo ezidla i-plankton kanye nento encane emiswe emidlalweni yamanzi iningi lama-gill rakers elide kakhulu futhi elincane kakhulu. Ezinye izinhlanzi zinamaphesenti angaba ngu-150 kuphela emgqeni ophansi.
I-Juvenile Gill Filaments
Ngemuva kwezinsuku ezingu-25-30 emva kokuzala, ama-gill filaments abonakala njengengxenyeni evela eceleni kwe-caudal yamagilegill. Lezi zinhlayiya zinjengezintambo futhi ngalinye liqukethe isitsha esisodwa segazi.
Ngosuku 70-75, bafinyelela ubude babo obude. Ekupheleni kwezinyanga ezintathu, izindlu zangaphakathi zifaka esikhundleni sezingxenyeni zangaphandle ze-gill.