Annelids: taƙaitaccen bayanin da irin

Annelid tsutsotsi - fairly babban rukuni na invertebrate kwayoyin. Bugu da kari, su ne mafi shirya wakilan tsutsotsi. An same su da farko a cikin sabo ne da kuma gishiri ruwa, kuma ma a cikin ƙasa. Wasu wurare masu zafi jinsunan leeches sun saba da wani terrestrial yanayin na zama.

Rubuta Annelida: general halaye

Girma na wannan kungiyar kewayon daga 'yan millimeters har zuwa shida mita. Quite halayyar alama ne gaban wannan gabar rabawa - jikinsu da aka hada da wani jam'i na zobba, wanda ya bayyana sunan da irin. External Guillermo yayi dace da ciki rabawa. Wannan shi ne dalilin da ya sa lokacin da jiki ne da suka ji rauni ko lalace annelid hasarar kawai 'yan segments, wanda nan da nan gano.

Wajen jiki da aka rufe tare da cuticle, wanda ba a sake saita. Daga shi girma chitin bristles - wani halayyar alama ce ta wannan rukuni na dabbobi. Wasu wakilan a kan segments iya zama parapodium - m m wata gabar jiki, wanda a wasu lokuta suna sanye take da m bristles ko gills.

Annelids: tsarin fasali na ciki gabobin

Domin wakilan irin wannan ne halin da kasancewar wani sakandare jiki rami - coelom. Wannan rami da aka cika da wani musamman m, godiya ga cewa goyon baya na al'ada matakan na ciki yanayi.

Akwai fata-murdede jakar wanda kunshi bukukuwa epithelium da tsoka harhada cikin zobe kuma a tsaye band.

Narkewa kamar tsarin ne a giciye-yanke, baki fara da ƙare da dubura. Annelids ne uku ƙungiyoyin hanji - gaban, na tsakiya da kuma raya. A wasu jinsunan kafa m salivary gland.

Karsh jiki ta hanyar fata. The kawai ware ne wasu marine jinsin dabbobi a cikinsa to parapodia located gills. Amma ga jijiyoyi, shi ne yawanci rufe. Ya kunshi ventral da dorsal lakã, waxanda suke da juna annular tasoshin. Zuciya a cikin wadannan kwayoyin ba - da motsi na jini samar da wani raguwa a dorsal lakã. Jini roundworms iya hada wani iri-iri na numfashi pigments.

A juyayi tsarin ne har yanzu quite sauki. A ƙarshen gaban na jiki ne babban jijiya ganglion, wanda ya yi aikin ayyuka na kwakwalwa. Yana fita daga jijiya igiyar, wanda Forms kananan ganglia a kowane sashi na jiki - jari na neurons. Hankula aka gabatar ta hanyar da idanu, da sinadaran ƙwarai jikinsu da kuma mechanoreceptors, wanda aka rarraba a ko'ina cikin jiki na tsutsa.

Annelids: siffofi da haifuwa da kuma ci gaban

Kwayoyin na wannan kungiya na iya zama duka biyu namiji da dauke da lalurar mata (yawa rarer). Alal misali, earthworm yana androgynous haihuwa tsarin, amma ya zama dole domin hadi na biyu mutane. Yana iya faruwa duka a cikin yanayi kuma da gabatarwar maniyyi a cikin mace ciki tashoshi.

Wani mai ban sha'awa Gaskiyar ita ce, da segmented tsutsotsi da pronounced rabawa da hali ya m da m farfadowa. Saboda wannan ga wasu jinsunan hankula na sake yiwuwar tohowarsu. Development of kwayoyin kai tsaye, ba tare da metamorphosis.

Ya kamata a lura cewa rawar da annelids quite nauyi. Alal misali, a sanannun earthworm ne ke da alhakin aeration na kasar gona. Wannan kungiyar hada da leeches, wanda sukan yi amfani da a zamani magani. Musamman da darajar yana hirudin samar da matsatsaku, kamar yadda thins da jini da ake amfani a anti-thrombosis da sauran hatsari cututtuka.