Kōhiwi Axial - chord. Biology o ona mahi me te hiranga

kia kawea ai nga mahi o te tautoko tinana, me te tiaki i nga whekau o kararehe i roto i ara e rua. I roto i te take tuatahi, he kōhiwi waho - anga. Kei te tito te reira o chitin, mo te kaha nui o nga tai konupūmā moe, ūkuikui silicon ranei. Waimāori, pūngāwerewere, moni nohinohi rawa, pepeke - he kararehe ki te anga, me te huaina hātaretare. Ko tētahi atu rōpū o kararehe i roto i embryogenesis hanga he kōhiwi ā, e mahi te chord tūranga.

whakamārama Biology tona ahua rite ki te hua o te tukanga o te organogenesis - te hanganga o te matatini o whekau axial. Kei roto i tēnei te ngongo neural, te punuatuna me te chord. Takanga o rapa taura tūhonohono ki neurula kukune atamira ko te huru ia o te tangata e rua, me te no kararehe ki te nekehanga Momo. E hi'opoa tatou i tenei tukanga i roto i te taipitopito ake, me te whakamārama i te wāhi o te kōhiwi axial i roto i vertebrates.

He aha te mea he chord i te koiora?

Whakatau i o tenei wahi o te kukune ko e whai ake: ko reira notochord tütahi hoki arā, o kiko tūhonohono rapa. Ko te wāhanga faufaa i roto i te embryogenesis o kararehe pērā i chordal. puta Tohuwāhi rauoro i raro i te ngongo neural o te tupuranga chordomesoderm ahu nei te ectoderm whēkau tuatahi. I roto i organogenesis, whakarerekētia e ia te ngongo intestinal, kei raro nei chord. Ko te tukanga whakaahuatia ana i runga he matatini me te e ako i roto i te akoranga o te koiora kura nui whānui. Me pēhea te ki te whakamārama ki ngā ākonga muri, ngā ākonga o te kararehe e tenei chord? Biology (Grade 7) hanganga i hanga whakaaro te tauira o te tuaka tuaiwi Amphioxus. E hi'opoa tatou i tenei take i roto i te taipitopito nui.

Ngā āhuatanga o te Momoroto bescherepnyh

Kei tēnei rōpū pūnahanaha kotahi piha - Amphioxus. ora Animals i runga i te raro o te Moana Black, te haamau'araa i te nuinga o tanumia i roto i te onepu, ka kitea i runga i te mata o te mutunga mua o te tinana tona ora, karapotia e te kāwai. Na roto i te tinana translucent marama e te ngongo mātotoru - chord. whakaaro Biology reira hei wāhanga o te pūnaha musculoskeletal o te kararehe. Notochord i Amphioxus, rite tahi atu chordates tahito - piharau me tuere, e pā ana ki te vertebrates jawless, hakari puta noa ontogeny nui ia te tūranga o te kōhiwi axial. I tua atu ki kaiao no ki bescherepnyh me cyclostomes, tonu notochord i roto i te tahi mau ika. A feruri i te āhuatanga o ratou hanganga.

ika cartilaginous

whai Common, pokiha moana, sawfish, taratara dogfish - he taitara o nga tangata rire-moana: Stingrays me mango. Ko tētahi wāhanga o ratou pūnaha tautoko me te kaupapa ngā te kōhiwi cartilaginous me uaua. I waenganui tinana vertebral i roto i te awa filosilivá he whatiwhatinga wäriu o te ua embryonic. Tēnei āhuatanga ko te faka'ilonga o te hanganga ā-o ika cartilaginous, e ara i roto i te pakeke wāhanga tiaki chord. faataa Koiora e whai ake: i roto i mahia embryogenesis notochord constrictions motu equidistant, i roto i nei kōkiri i te tukanga e calcareous putunga hanganga. Ratou āta wehewehea te rauoro i runga i te tinana o te wheua ngohe pekehoe, kiko tūhonohono, me ona wahi noho i roto i te kōpae intervertebral.

Āhuatanga o te hanganga o te ika Sturgeon Series

Fakataha ki te mango, me hihi, me nei i nui i roto i te noa ratou, māngai o tenei rōpū no ki te ika tawhito. Hoki sturgeon, beluga, āhuatanga hanganga stellate e taua āhuatanga rite roto kōiwi cartilaginous me notochord. ta Biology e puta nga tupuna o sturgeon i roto i te wā Devonian o te wā Paleozoic. Mai i tēnei wā i runga i to ratou anatomy kore kua puta ke nui. puka Pakeke whai ua hipokina ki te anga o mātotoru kiko tūhonohono, me te ora tonu. Rawa maroke sturgeon chord stellate, sturgeon me ētahi atu sturgeon i roto i Russia kua roa kua whakamahia i roto i te kai e rite ana te whakakī mō takai me te porowhita, karanga reira vyazigoy.