Kiriwai - Ko te kawainga o maha whēkau me te kopa

Ontogeny tetahi rauropi āhuatanga e te hanganga o paparanga iroriki. Taua tahito momo o te kararehe, kia rite ki ngā coelenterates me kāri karihi o e rua anake ngā papa: te kiriroto me ectoderm. Neke atu i te wa, i te puka atu ahu whakamua o kaiao, i reira te mea he wahi tuatoru o te pepa - te kiriwai.

He aha te mea te kiriwai?

Ontogeny Ko te whanaketanga raupapa o te ira, haere tahi nei i te maha o ngā rerekētanga i roto i te Morphology me anatomy o te rauropi taitamariki heke mai. Kiriwai - he rau embryonic, e whai wāhi nui i roto i te hanganga o te maha whēkau me te kopa. kararehe multicellular tahito pērā rite te hydra, kakaru, rupi kāri ranei kahore he hoki tetahi mea i huaina kararehe bilayer, t. Ki. I roto i te tukanga o ontogenesis kua hanga e rua anake paparanga iroriki.

hanganga kiriwai

He rerekē te tukanga o whakapanga te apa iroriki waenganui i rerekē rōpū taxonomic. E toru tikanga tino pai mohiotia i roto i nei te kiriwai i hanga: te teloblastichesky, me ectodermal enterocoel.

hāngai 1. Teloblastichesky kiriwai ara whanaketanga angamaheni mo maha protostomes kararehe, me te i runga i te hanganga o te blastomeres. Etahi o ratou faaaravihi i whakapanga i te apa iroriki waenganui, e iku e te ahua o rua takai whakarara roa. Ēnei rïpene me te hoatu ara ki te kiriwai.
Ko faufaa rerekē i roto i taua hanga i te pūtau kawainga o te kiriwai te intussusception (invagination) ki kiriroto 2. tikanga enterocoel. Tenei invagination ngā te kōpiro tuatahi i roto i te heke mai. Ko te rohe i waenganui i nga rau te roa e rua tonu indiscernible, a muri anake i te kiriwai wa roa wā rite te apa motuhake detaches i te kiriroto. He āhuatanga o te kararehe pērā i lancelet pātangaroa ranei tenei tikanga o te whanaketanga.

3. te tikanga o te mesodermal ectodermal i enei momo o te kararehe, pērā i ngokingoki, manu me kararehe (tae atu ki te tangata). Ko te rārangi raro ko e hanga e te kiriroto anake te i muri i te invagination. Ki te whakaaro tatou i te pikitia o te ira i roto i te horopaki o, i muri i gastrulation (hanganga o invaginations o) e puta i te wāhi noa i waenganui i ento- me ectoderm. He a "tupu" o ectodermal take o ngā pūtau e hoatu ara ki te kahu hou o te ira.

Ko te Morphology o te kiriwai

He tūranga nui i roto i te hanganga o te whakaari kukune kiriwai. Ko te tohu koiora whanaketanga pai tenei, no te mea te rerekētanga i roto i te Morphology o te apa iroriki waenganui i rerekē rōpū o kararehe whakamahia i roto i te systematics.

Ki te whakaaro tatou ki nga here ahopou e rua, e kua hanga e e aratau teloblasticheskom o te whanaketanga, ka te kiriwai e te aroaro wāhanga metamerically auau. Kei te wehea te taha hikumārō o ia taua whitiki ki somites, taha - i runga i nephrotomy me te puku - i runga i splanchnotome.

He aha te tūranga e te kiriwai? whekau Human i hanga i te kiriwai

Ia paparanga nucleation ko te ahua o te kawainga o ngā pūnaha whēkau me te kopa rauropi heke mai. Āhuawhatunga hanga rau te nuinga whakatau ratou whakarau. Mai te kiriwai -. He te apa purapura toharite, kua whai wāhi te reira i roto i te hanganga o te kopa me okana, e kua kei waenganui i nga rakau o te tangata, me nga papa o roto rawa o te tinana. He aha ngā hanganga whai takenga mesodermal?

1. Ko tika hanganga kiko tūhonohono tetahi o nga pūtau kiriwai. Tenei papanga Ko te rohe i waenganui i nga papa o waho, me te roto o tata tetahi okana o te kararehe.
2. pūnaha musculoskeletal e ngā o te pūnaha kōhiwi me uaua hoki he takenga mesodermal. Here i tatou i roto i te ngakau te kore anake uaua kōhiwi engari ano taiepa uaua o oko toto, ngakau, me te tahi atu whekau me ngā hanganga. Ko te kōhiwi kanohi i roto i te tangata te nuinga i te wheua kikokiko, a ki te iti - o ngohe kiko. A, no te haere mai te reira ki chordates, i te wā embryonic, e ko te hanganga o te chord, tetahi e kore whakapoauau te takenga o te hanganga axial o te tuaiwi. Ki te he pono o te take mesodermal te whakamutunga, te rauoro - Ko nga whakakorenga o te whēkau, i te tikanga e pā ana tona takenga te ki te kiriroto.
3. i hanga ano pūnaha Fakasekisualé, me te puha i kiriwai. Ko ratou i roto i te nuinga o chordates e pā ana ki tetahi ki tetahi, a reira, kua hanga e i te apa iroriki taua.
4. takenga Mesodermal he pūnaha circulatory. Ka rite ki te ngakau me te toto oko e hanga e e pūtau o te apa iroriki waenganui.

mutunga

Kiriwai - Ko te hanganga matatini i runga i te hanganga o te ira e pae hopea homai ara ki maha whēkau faufaa me te kopa. Rerekē ngā rōpū taxonomic o kararehe, he rerekē te hanganga me te whanaketanga o te rau waenganui, a ko tetahi o nga āhuatanga whanaketanga tenei. Ko te aroaro o ngā kiriwai ki te kararehe e toru-paparanga e ko te tohu kaha o ngā rōpū matatau.