Deuterostome dabbobi: rarrabuwa

Feature deuterostome dabbobi ne cewa a lokacin da amfrayo ci gaba a wuri na farko rami da aka kafa na dubura, da bakin da baya bayyana a cikin wani mabanbanta wuri. A wasu kalmomi da za mu iya ce cewa tayin yana da wani bakin bude a daya karshen, kuma ya fara tasawa mutum - a gaban matsayi. Deuterostome dabbobi kasance a cikin daula na sub-sashe, wanda ya hada da echinoderms, chordates da hemichordates. Sun kasance a cikin abin da ake kira bilaterally tsakaitã rayayyun kwayoyin halitta.

Features na bilaterally tsakaitã dabbobi

A babban alama waɗannan dabbobi ne cewa hagu da kuma dama bangarorin na jiki - wannan shi ne bayyananne madubi na juna. Yadda za a fahimci wannan? Ka kawai bukatar sallama a jirgin sama, wanda, kamar yadda ya raba jikin dabba a cikin rabin. A wannan yanayin, biyu daga cikin wadannan sassa za m. za ka iya samun manufar "bilaterally tsakaitã" dabbobi a wasu kafofin.

Wannan yanayin ne gaba daya daban-daban daga cikin irin sauran fauna da mutane, a cikin abin da jiki ne dakatar symmetrically. Wannan yana nufin cewa ba dukan gawawwakin an sanya a cikin wannan jirgin sama. Kuma bilaterally tsakaitã babu sauran jirage. Wannan yanayin yana da kyau al'amurran. Wadannan dabbobi ne sosai sauki don motsawa a madaidaiciya Lines da kuma nuna. Su ne na farko deuterostome da dabbobi.

Ba kamar protostomes daga deuterostome

Wakilai daga wadannan jinsunan, ko da yake irin wannan, amma da bambance-bambance yi wanzu. Kamar yadda aka ambata, a bilaterally tsakaitã kuma suna protostomes deuterostome dabbobi. Wadannan sunayen zo daga yadda suka rictus tasowa a lokacin da amfrayo ci gaba. A miƙa mulki protostomes blastospores (rami a primary Gut) samuwar a cikin baka rami. Kuma a cikin wannan wuri deuterostome kafa dubura. Cikinsa da bakinka bude da aka kafa a cikin wani sabon hanyar a ƙarshen gaban amfrayo. Akwai kuma lokutta inda akwai cikakken ƙulli daga cikin blastopore, da kuma bakin da dubura bayyana sake.

Kuma wanda mafi muhimmanci bambancin da yake a cikin sa hannu ci gaba da kwakwalwa. A protostomes tasowa kwakwalwa na fara tasawa dabba. A deuterostome ne ta kudi rage da sabon kafa sake sauran wurare. Deuterostome dabbobi ne kira vtorichnomozgovymi.

Nau'in deuterostome dabbobi

Mun gani, wanda da deuterostome dabbobi, misalai da siffofin da suka ci gaba. Yanzu yana da lokaci don gano wanda ke da mulkin ga wannan subkingdoms. Wadannan sun hada da wadannan iri:

- chordates.
- chaetognaths.
- echinoderms.

Yanzu bari mu duba a daki-daki, abin da dabbobi deuterostome dabbobi. By irin tsirkiya ne Amphioxus, lampreys, kifi, halittar dabba mai kafafuwa, da abubuwa masu rarrafe, da tsuntsaye da kuma dabbobi masu shayarwa. By chaetognaths hada da marine dabbobi, cikin shahararrun wakilin ne teku kibiya. A sosai sabon abu irin echinoderms hada da tarwada, teku urchins, teku cucumbers, teku furannin bi-rana. Duk wadannan fauna a kowa ne cewa su - deuterostome dabbobi. Bugu da kari ga siffofin kafa bakin, wadannan halittu suke kuma bambance-bambance a ci gaban sauran sashin jiki tsarin.

Features na ci gaba da tayi chordates

Chordates - shi deuterostome dabbobi cewa bambanta a cikin bayyanar, image da rai yanayi. Wakilai daga irin wannan za a iya samu a ko'ina. Suna zaune a ƙasar da kuma a cikin ruwa da kuma a cikin ƙasa, kuma a cikin iska. Yada a duniya. Yawan ne game da dubu arba'in.

Yana hadawa da su gabã gaban axial kwarangwal, to wanda amfrayo ci gaba mataki ne wakilta a matsayin notochord (tsirkiya). A manya ba a ƙẽƙasasshen tsari, shi ya zauna kawai a cikin ƙananan wakilan irin. Kowa, da shi ke da samuwar kashin baya, wanda shi ne na ci gaba da tufka ta wãyi segmented.

Hanyar crushing kwan da ya hadu ne ma da bayãnin hukuncin fasalin tsakanin biyu Subkingdom: karkace a protostomes da radial a deuterostome.

A juyayi tsarin ne m tube, gaba, na daga wanda daga baya ya zama cikin kwakwalwa. ya ventricles aka kafa daga ciki rami.

A cikin agara yankin na narkewa kamar tube ne biyu jerin ramuka ta hanyar abin da akwai sadarwa tare da waje muhalli. Wannan ake kira visceral kogon. Lower chordates wakilan a wannan wuri da gills. All sauran ne kawai tayi rudiments, wanda suke sa'an nan ba aiki.

Wasu kafofin koma zuwa abin da ake kira deuterostome hemichordates. Wannan tsutsa-kamar benthic dabbobi. Halin da notochord (hordopodobny jiki) da kuma biyu daga gill slits. A tayi ci gaba reminiscent na chordates, amma tsarin da jiki ne gaba daya daban-daban. The jiki ne wakilta uku sashen: proboscis, abin wuya da kuma akwati.

chaetognaths dabbobi

Wadannan dabbobi ne marine da yara, yana da ikon m motsi. Outwardly, suka yi kama da kibiya wanda aka nuna a gaban karshen, kuma mai wutsiya a baya. Waɗannan su ne mafi kyau bristles, wanda na kama da dabba abinci. Jikin sa up kai, jiki da kuma wutsiya. Akwai twin gefe da kuma daya wutsiya fins.

Na ga wadannan dabbobi deuterostome kunshi a amfrayo ci gaba da baka rami da cewa radially murƙushe kwai. A duk sauran madaidaci akwai wasu bambance-bambance. Wadannan dabbobi ba su da Sistem, na numfashi da kuma excretory tsarin. Akwai ma wani haihuwa ducts. A juyayi tsarin ne a peripharyngeal zobe.

Features echinoderms dabbobi

A halayyar siffa daga cikin wakilan da irin wannan ne gaban tentacle tsarin. Wannan ruwa-cika cavities, da wanda dabba motsa, numfasawa da ya haifar da shãfe secretory tafiyar matakai.

Hanji ne mai dogon tube ko jakar. Sistem sakulasan tsarin kunshi madauwari kuma radial tasoshin. A lalata kayayyakin tsaya fitar ta hanyar kananan pores a cikin ganuwar na jiki. Talauci ɓullo da ma'ana gabobin da juyayi tsarin. Amma da kyau-raya regenerative damar iya yin komai. A gaggawa, waɗannan dabbobi iya jefar sassa na jiki na cewa an gano bayan makonni biyu. Godiya ga wannan fasalin tarwada iya ko haifa ta rarraba a biyu. Bayan wani lokaci, na biyu rabin ne gaba daya mayar.

sakamakon

Daga cikin sama ba za mu iya ganin abin da dabbobi deuterostome, game da peculiarities na raya kasa, da kuma wakilan da subkingdoms. Babu shakka cewa wakilan wannan jinsin su ne ban sha'awa sosai. Har yanzu ci gaba da karatu.