Waa maxay mesoderm ah, iyo waxa ay horumarka?

Embryogenesis - geedi socod adag, taas oo ah waxa lagu gartaa formation tartiib ah xubnaha iyo unugyada. Inta badan noolaha multicellular, jeermiga ee embriyaha waxay ka kooban tahay saddex lakab: ectoderm, endoderm, mesoderm. Waa maxay mesoderm ah? Iyo lafaha chitin of cayayaanka iyo epidermis ee maqaarka, iyo habdhiska waa ka soo jeedo ectodermal. Dheefshiidka, hormoonada jidhka iyo nidaamka neef-soo sameeyey endoderm ah. Sidee, ka dibna, xubnaha iyo unugyada ku siinayaa asaasmeen mesoderm? Sida waxa la aasaasay?

Waa maxay mesoderm ah. qeexid

nudaha ama xubin kasta oo nidaamka la aasaasay of lakabka ah qaar ka mid ah unugyada embriyaha. Waa maxay mesoderm ah? In biology, qeexidda waa in ay tahay mid ka mid ah layers jeermiga, kaas oo inta lagu guda jiro embryogenesis sameeyay tiro ka mid ah xubnaha iyo unugyada. Magaca mesoderm Second - mezoblast. formation of lakabka tani waa caadiga ah ee ugu badan xoolaha multicellular (marka laga reebo: nooca maro iyo nooca Coelenterates).

Mesoderm ku yaal dhexeeya ectoderm iyo endoderm. Mid kasta oo ka mid ah layers jeermiga deriska ah ka qayb qaadan kartaa in formation of mezoblasta. Iyadoo la raacayo, laba nooc oo asal ahaan qarsan lakabka SNMna bartamaha: entomesoderm, ekzomezoderma. Waxaa sidoo kale jira xaalado ay dhismaha ka qayb mezoblasta mar labada dhismayaasha.

Mesoderm sida gaar ah sheet nucleation sameeyay gastrulation tallaabo.

formation mesoderm. Features of formation

Waa maxay mesoderm ah? In biology, waxaa la qiyaasayo in xubin kasta oo ka mid ah embryogenesis xoolaha multicellular sameeyay mid ka mid ah layers jeermiga. Formation of mesoderm - caadiga ah aramorfoz flatworms nooca .. Sidaas in ay la aasaasay lakabka ugu horeysay run dhexe Germinal. Nooca buushka iyo Coelenterates nooca xayawaanka bilayer wakiilka in embryogenesis sameeyay ectoderm iyo endoderm kaliya.

Sidee waa formation of mesoderm ah?

Waxaa jira saddex siyaabood oo mezoblasta waxbarashada.

1. Teloblastichesky. Protostomes caan ku xayawaanka. cell kasta waxaa la aasaasay ka teloblastov mesoderm oo been ka dhexeeya ecto- iyo endoderm. Sidaas darteed laba strips ay weheliyaan embriyaha jeermiga mesoderm ah.
2. Enterocoel. Qaabkan ah formation of mesoderm waa caadiga ah ee deuterostome ugu (kruglorotnye, kalluunka, lafdhabarka). unugyada mesoderm loo sameeyay ka soo qaybaha kala gaar ah oo mindhicirka heer hoose ah.
3. From ectoderm ah. Habka noocan oo kale ah ayaa laga helay xamaarato, shimbiraha iyo nuujiya. Its peculiarity waa in mesoderm waxaa la aasaasay by invagination of ectoderm ah.

Dhismaha mesoderm ah

Waa maxay mesoderm ah? Tani ma aha oo kaliya cluster ah unugyada isku mid, oo kala galay dhowr waaxaha functional of lakabka farcankii. mezoblasta Kala dhacdaa si tartiib tartiib ah, taasoo keentay in meelaha soo socda ayaa loo qoondeeyey:

1. Somites - aaday formation xirmado u eg, oo u dhexeeya, taas oo la aasaasay oo dhan - dalool ah jidhka sare. Madax adaygeen isla annelids iyo cayayaanka.
2. rudiment ee notochord ah - mesoderm shirqool, taas oo mustaqbalka ku horumaraa gooye. feature A ee kala duwan ee vertebrates.
3. In vertebrates, somites loo sameeyay ka sclerotome kasta, dermatitis iyo myotome.
4. Splanchnotome - side saxan oo kala qaybsanyihiin laba lakab oo kala duwan, gudaha iyo dibadda ah. Therebetween in vertebrates waxaa la aasaasay guud.
5. Nephrotomy - dhismeedka aaday splanhnostomy xira.

Ka dib baadhaya qayb kasta oo daaha jeermiga, saynisyahano ah ay awoodaan si loo ogaado waxa mesoderm ah, iyo si ay u fahmaan waxa ay u shaqeeyaan waxa qabata.

histogenesis

mesoderm wuxuu ku siinayaa asaasmeen dhawr nooc oo ah unugyada.

1. flatworms Parenchyma, taas oo qabanaysa bannaan oo u dhaxeeya meydadka. Waxaa soo sameeyey mesoderm ah.
2. Qaar ka mid ah unugyada epithelial daboolnaayeen jidhkooda ka baxsan. Waxaa ka mid ah unugyada secretory, hormoonada iyo qanjirka exocrine.
3. Mesoderm soo sameeyey unugyo buunshada buunshada iyo cufan dabacsan. Oo ay ku jiraan dhisidda ee collagen iyo macdantaa laastikada.
4. Unugyada dhiiga ayaa sidoo kale soo sameeyey mesoderm.
5. Lafaha iyo unugyada carjawda, xubno ay yeelanayaan asal mesodermal.
6. By eegtahay la xubno ka sameeyay dhiig, mesoderm sidoo kale ku lug leh dhismaha unugyada habka difaaca jirka.
7. Dhammaan noocyada kala duwan ee unugyada muruqa. muruqyada siman yihiin la dhigay darbiyada xubnaha ugu. Dunta Striated yihiin xubno ka dhismaha ee muruqyada lafaha. Ha illoobin oo ku saabsan nudaha wadnaha striated muruqa, kuwaas oo foomamka muruqa wadnaha.

organogenesis

Safaleetiga ah u sameeyaan xubnaha, sidaas darteed, ma adag tahay in la malayn kuwa ku jira ka soo jeedo mesodermal. kala soocidda lagu siiyey on goobaha mesoderm:

• dermatomes - maqaarkaba ah qaab maqaarka (dhididka iyo qanjiro Qanjirrada waa qayb ka mid ah maqaarka);
• sclerotomes soo sameeyey qayb ka mid dadban ee appatara ee muruqyada (lafaha);
• of myotomes siday u kala horreeyaan, - qayb firfircoon ee nidaamka muruqyada (murqaha);
• splanhnostomy dawadda mesothelium ah - hal epithelium ah lakabka in khadadka saabka jidhka sare;
• unugyada nephrostomy sameeyaan nidaamka excretory iyo taranka.

xubnaha Provisory asal mesodermal

Waxaa xusid mudan in la xuso kuwa xubnaha in ay yihiin marxaladaha kala duwan ee ontogeny waxaa laga badiyay ka dib markii waxqabadka hawlihiisa. Waxaa loo yaqaan ku meel gaar. Kuwaas waxaa ka mid ah:

1. Amniyon - mid ka mid ah xuubka ee embriyaha waxay, taas oo qabata dhowr maarmin. marka hore waa in la abuuro jawi biyaha ee horumarka ah ee ilmaha caloosha ku. Sababtuna waxay tahay, in formation of jirka waa in la qabtaa biyo. Waayo, vertebrates ku nool dhulka, biyaha kiiskan waa mid xaddidan, oo sidaas daraaddeed qolof this waxaa la aasaasay in koorsada ah ee horumar. Amniyon sidoo kale ilaaliya midhaha ka dhaawac, taageero dhexdhexaad ah by dayactirka uruuray cusbo joogta heer joogto ah, iyo sidoo kale ka hortagtaa embriyaha waxay ka saamaynta walxaha sunta ah.
2. Allantois - jirka kale embriyaha oo u qabata labada hawlaha nafaqada iyo Neefta. By asal ahaan waa farac ka mid ah baxaan koleyga dheefta, taas oo macnaheedu yahay in ay sidoo kale waxaa la aasaasay by unugyada ka mid ah endoderm iyo mesoderm. In aadanuhu allantois waa yar horumaray badan xubnaha kale ee laf ah, laakiin on waxay tahay xididdada dhiigga, oo markaas ku dhicin nudaha xudunta.
3. koleyga ayaa yellow. jidhkan ku meel gaar ah ku jira nafaqooyinka lagama maarmaanka u ah horumarinta ilmaha caloosha ku. In formation of unugyada mesoderm koleyga dheefta iyo lug, iyo endoderm. feature xiiso leh waa formation of jidhka ku dhex jira, waayo, unugyada dhiigga ee u horeeyay ee jirka.
4. xudunta (xundhurta) - xiriirisa embriyaha iyo mandheerta.
5. Chorion - embriyaha galkeeda via kaas oo lifaaqa in ilmo galeenka iyo mandheerta formation.
6. Mandheerta - xubinta kaliya ee unugyada aadanaha sameeyay laba noolaha: hooyada iyo ilmaha caloosha ku. uurjiifka dhiiga mandheerta Hooyo helo nafaqo iyo oksijiin.

hawlaha mesoderm

Waxaan ka fikiray waxa mesoderm. Waa maxay hawlaha lakabka jeermiga?

horumarinta mesoderm ayaa loo ogol yahay flatworms dhiman ku buuxi dhexeeya meydadkii unugyada parenchymal ah. In noolaha sare parenchyma ma, laakiin mabda'a waa la mid ah, unugyada asalka mesodermal sameeyaan lakabyada soohdinta u dhaxaysa meydadka. Mezoblasta shaqada ugu muhiimsan waa formation of xubnaha ku meel gaar ah ee embriyaha waxay (allantois, xudunta, mandheerta, iwm ...) Sidoo kale mesoderm unugyada sameeyaan deegaanka gudaha unugyada, dhiigga iyo dheecaanka.

gunaanad

Hadda waxaad si buuxda u sharxi kartaa waxa mesoderm ah. Her waxbarashada ayaa loo ogol yahay xayawaanka in ay u guuraan marxaladda cusub ee horumarinta, sida ku cad asalka ah ee xubnaha iyo unugyada badan. Intaas waxaa sii dheer, formation of xuub amniotic sababay boodboodi a tayada horumarinta vertebrates. Sidaas awgeed, mesoderm ah waa element evolutionary muhiim ah.