Ntshulube Polychaete: inkcazelo emfutshane kwiklasi

ntshulube Polychaete njengangoku ingqalelo eli qela likhulu eziphilayo zaselwandle. Abameli zixhaphakileyo kwiklasi bahlala kwi emazantsi olwandle umzimba ngamanzi, yaye kuyanqaba ebakhokela ngendlela planktonic yobomi.

ntshulube Polychaete: ukwakha umzimba

Ummeli kulo mzimba iklasi ibandakanya yintloko yesebe, umzimba elide kunye lobe ethile ezimpundu. Kwiimeko ezininzi, umzimba wesilwanyana yahlulwe ngokucacileyo ibe amacandelo eziliqela, nganye iqhotyoshelwe parapodium.

Parapodia amele into enye into ngaphandle esiphelweni abangekaphuhli kunye Mthovu ezincinane ezifumaneka. Okubangel 'umdla kukuba amanye amalungu parapodium iqela uguqulwa iigilizi.

Njengoko namanye amalungu uhlobo annedil (rhorho Oligochaeta) ukusuka loo emzimbeni isilwanyana zezikhumba-kwimisipha sac. Ngaphezu umzimba worm wambu Ulobuza obhityileyo yokhuselo, nto leyo ibekwe phantsi epithelium single-umaleko. Ngezantsi esikhumba izihlunu, equka izihlunu longitudinal kwaye setyhula ukuba banoxanduva intshukumo nokunciphisa umzimba isilwanyana.

ntshulube Polychaete: isakhiwo yangaphakathi

Abameli beli esigaba inkqubo yokucola noko aphuhliswe kakuhle, nto leyo equka ezintathu. Inxalenye phambi ibandakanya emlonyeni ovula kungena kwisisu ngomlomo. Ke intwana yokutya oluwe pharynx dystrophy. Hi ndlela leyi, ku pharynx iqulethe enamandla ngechitin. Ezinye iintlobo baze bakwazi bajije ngaphandle.

Emva ukugaya ukutya emphinjeni luvula amadlala eziphambili ezibangela namathe. a ngabameli ezimbalwa kuphela kuba esiswini encinane. Le midgut yesilwanyana isetyenziselwa ukugqiba ekwetyiseni kunye nokufunxwa izondlo ezibalulekileyo. Icandelo emva emathunjini inoxanduva ukuyilwa endleni kunye empundu ivula phezu amaphiko inxalenye nomhlehlo ezimpundu.

ntshulube Polychaete abe ivalekile inkqubo yokujikeleza kwegazi, nto leyo ibandakanya amanakani okuba kunye yegazi ventral. Hi ndlela leyi, isitya amanakani mkhulu kwaye umsebenzi contractile, ngoko ke isebenza njenge intliziyo. Ngaphezu koko, imithambo ezinkulu eziqhagamshelene ebizwa ngokuba yi-iimpahla babona ukuba igazi kwiziphelo kunye iigilizi.

isixokelelwano sokuphefumla xa abameli kule klasi angekhoyo. imizimba transfer Gas wesikhumba kunye iigilizi ezithi zilungiswe kwi nokuba parapodia, nokuba ngaphambili, intloko yecandelo yomzimba.

inkqubo yokwabiwa ibandakanya metanephridia encinane apho ukususa iimveliso ezingafunekiyo pathways kolwelo coelomic kokusingqongileyo lwangaphandle. ingxenye nganye isibini yaso ngamalungu excretory ukuba uvule ngaphandle imingxunya ezincinane - nefroporami.

Njengoko luvo, kuquka umsesane eqhelekileyo peripharyngeal, leyo isuka ventral nemithambo intambo. Okubangel 'umdla kukuba phantse onke amalungu ale klasi abe ephuhliswe kakhulu amaziko kwebala kunye nevumba. Kwezinye iintlobo, kukho amehlo.

ntshulube Polychaete: uhlelo zokuzala ziveze

Kuba isiqalo kubalulekile ukuphawula ukuba phantse zonke iintlobo zesi qela bayakwazi ukuzala maqanda, nokuthe kwiimeko ezininzi limelwe ukuqhekezwa umzimba, akufane ngokuthi yavelisa amagqabi.

Noko ke, izilwanyana kufuneka ube nenkqubo ephuhliswe kakuhle zokuzala. Veliswa ziimpethu kuphela dioecious. Gonads akhiwa eludongeni lweHo- yomzimba yesibini. Inkululeko kweeseli lwegciwane mazenziwe ngokusebenzisa abana zomzimba - kule meko umntu omdala uyafa. Abanye abameli baye imingxunyana ezithile apho olwabiweyo gametes. Ukuchumisa kwenzeka ngendlela zolwelo medium. Ukusuka elilodwa iphuhlisa ngumbungu, apho kubonakala ukuba ufana nganto omdala. Ngako oko, uphuhliso iimpethu oselula lwenzeka nge milo.