Lafaha Axial - gooye. Biology of hawlihiisa iyo muhiimadda

Shaqooyinka taageero jidhka iyo ilaaliyo xubnaha gudaha ee xayawaanka lagu qaban karaa labo siyaabood. Xaaladda hore, lafaha ah oo dibadda ah - madaafiic. Waxay ka kooban yahay chitin, waayo, xoog weyn oo ka mid ah lagu cufay calcium cusbada, fosfooraska, ama Silicon. Crustaceans, caarada, caarada, cayayaanka - yihiin xoolaha la qolof oo wuxuu u yeedhay xawayaanka. Koox kale oo ka mid ah inta lagu guda jiro dubato embryogenesis foomamka lafaha gudaha ah, taas oo qabata gooye doorka.

Biology sharxayaa muuqaalkiisa oo sabab u ah geeddi-socodka organogenesis - formation of adag oo ah ka mid ah xubnaha axial. Tan waxaa ka mid tube neural ah, mindhicirka iyo gooye ah. Dhacdo Xadhigga connective laastikada in embriyaha stage neurula waa astaanta ah ee dadka iyo xoolaha ka tirsan guuro Nooca. Ina keena aynu baaro habka this si faahfaahsan, iyo sidoo kale caddeeyo doorka lafaha axial in vertebrates.

Waa maxay gooye bayoolaji?

Determination of qayb ka this ee embriyaha waa sida soo socota: waa notochord unsegmented ka kooban unugyo laastikada. Waa qayb muhiim ah in embryogenesis xoolaha sida chordal. Bookmark gooye dhacdaa hoos tuubada neural ee chordomesoderm jeermiga kaas oo la soo minguuriyey ectoderm xiidmaha hoose. Inta lagu guda jiro organogenesis, ayuu dib u habaynta tube xiidmaha, hoos gooye ku yaal. hababka kor ku tilmaamay kuwo xaalado adag oo bartay in koorsada bayoolajiga dugsiga sare guud. Sidee si ay u sharxaan in ardayda yaryar, ardayda cilmi barasho xayawaan in gooye this? Biology (Darajada 7) qaab-dhismeedka sameeyay ka fikiraya tusaale ah ee dhidibka spinal Amphioxus. Ina keena aynu baaro arrintan si faahfaahsan weyn.

Astaamaha u gaarka ah nooc hoosaadka ee bescherepnyh

Kooxdan nidaamsan ku jira mid ka mid fasalka - Amphioxus. Xayawaanka ku nool on hoose ee Badda Madow, inta badan maku lagu aasay cammuudda oo qaawan dushiisa ugu dambaysta hore ee jidhka naftiisa, oo colal ku gacmahaaga. Iyada oo jidhka translucent waxaa ciinwaanka by tuubo cufan - gooye. Biology u aragto sida qayb muhiim ah oo nidaamka muruqyada ee xayawaanka. Notochord in Amphioxus, sida chordates kale heer hoose - lampreys iyo hagfish, la xiriira ee vertebrates jawless, hadiyad ontogeny oo dhan Waxay kaalin ee lafaha axial. Waxa intaa dheer in noolaha tirsan bescherepnyh iyo cyclostomes, notochord sii socoto in qaar ka mid ah kalluunka. Fiiriya qaababka ay qaab-dhismeedka.

kalluun cartilaginous

stingray Common, dawaco badda, sawfish, spiny dogfish - horyaalka ah oo deggan qoto-Badda, stingrays iyo galayaan. Iyadoo qayb ka ah nidaamka taageerada iyo dhaqdhaqaaqa ka mid ah lafaha ah cartilaginous iyo muruqyada. Inta u dhaxaysa meydadka vertebral ee kanaalka laf-dhabarka waa jajabkii haraaga ah ee laf-dhabarta SNMna. Habkaani waa astaanta ah ee qaab-dhismeedka gudaha kalluunka cartilaginous, kuwaas oo xitaa qaangaarnimada qayb raagayaan gooye. Biology sharaxay sida soo socota: inta lagu jiro notochord embryogenesis abuuraa caqabadaha gooni meelsha, taas oo habka la bilaabay dhismayaasha kayd calcareous. si tartiib tartiib ah waxay gooye ku jirka ah ee carjawda araxda kala qaybiyaan, unugyo iyo qaybo ka mid ay ku sii gudaha cajaladood intervertebral.

Features of qaab-dhismeedka Sturgeon Taxanaha kalluunka

Si wadajir ah la galayaan iyo rays, kuwaas oo la ay leeyihiin badan ka wadaagaan, wakiillo ka kooxdan ka tirsan tahay kalluunka qadiimiga ah. Waayo, sturgeon, Beluga, qaab-dhismeedka stellate waxa lagu gartaa qaababka sida lafaha cartilaginous gudaha iyo notochord. Biology ayaa sheegay in awoowayaasha sturgeon muuqday in muddada Devonian ee Zaman Paleozoic ah. Laga bilaabo halkan on ay anatomy uusan waxba iska badalin badan. Foomamka Adult leeyihiin laf-dhabarta daboolay qolof ah unugyo ku cufan iyo nolosha sii. Gaar ah la qalajiyey sturgeon stellate gooye, sturgeon iyo sturgeon kale ee Russia ayaa muddo dheer loo isticmaalo in cuntada sida buux a for naan iyo pie, oo ugu yeeray vyazigoy.