Axial marangwanda - Chord. Biology mitambo yayo uye kukosha

Mashandiro anoita muviri rutsigiro uye kudzivirira zvomukati mhuka dzinogona kuitwa nenzira mbiri. Muchiitiko chokutanga, yokunze marangwanda - deko. It rinoumbwa chitin, nokuti simba kukuru akaiswa mushonga wokuuraya karusiyamu munyu, phosphorus kana nesilicon. Crustaceans, madandaude, mites, tupukanana - imhuka pamwe goko akadana invertebrates. Rimwe boka fauna of panguva embryogenesis unoumba munhu womukati marangwanda, izvo anoita basa Chord.

Biology anotsanangura kwayo chitarisiko somugumisiro nedanho organogenesis - paumbwe kuzvivako zviri axial nhengo. Izvi zvinosanganisira Neural chubhu, kuti dumbu uye Chord. Panowanikwa kwakavharwa nenyama connective tambo neurula danho mudumbu ndiro kuzivikanwa zvose vanhu nemhuka ndezvaJehovha Type unotii. Ngationgororei izvi muudzame, uyewo kujekesa basa racho axial marangwanda ari vertebrates.

Ndechipi nevaya zvipenyu?

Kutsunga chikamu chino embryo riri sezvinotevera: zviri unsegmented notochord zvinosanganisira kwakavharwa nenyama connective tishu. It kunokosha pakuderedza ari embryogenesis mhuka dzakadai chordal. Bookmark Chord kunoitika pasi Neural chubhu ine utachiona chordomesoderm kunobva ectoderm chepuraimari ura. Panguva organogenesis, iye dzakachinja intestinal chubhu, yaiva pazasi Chord. The pezvakaitwa pamusoro apa zvine zvakaoma uye vakadzidza mukufamba mukuru chikoro zvipenyu. How kutsanangurira vadzidzi vaduku, vadzidzi zvemhuka kuti Chord ichi? Biology (Grade 7) mamiriro vakaumba kufunga muenzaniso musana akabatana Amphioxus. Ngationgororei nyaya iyi apa.

Zvinoitwa subtype bescherepnyh

Ichi hurongwa boka rine imwe kirasi - Amphioxus. Mhuka vanogara pasi kweGungwa Dema, yakawanda youpenyu hwake akavigwa mujecha uye vakafumura pamusoro pemvura pamberi kuguma muviri, takapoteredzwa tentacles. Kuburikidza translucent muviri yakavhenekerwa munhu gobvu chubhu - Chord. Biology anofunga kuti ive chinokosha pamusoro zvetsandanyama nemapfupa ezvinhu mhuka. Notochord muna Amphioxus, kufanana nezvimwe chinyakare chordates - lampreys uye myxines chokuita jawless vertebrates, chipo kusvikira ontogeny Iye kuridza basa axial marangwanda. Kuwedzera zvinenge yomumwe bescherepnyh uye cyclostomes, notochord hunoramba dzimwe hove. Funga zvinhu mamiriro avo.

nehove cartilaginous

Common stingray, gungwa gava, sawfish, spiny dogfish - zita kwakadzama-gungwa vagari: stingrays uye Sharks. Sechikamu dzaitsigira ino uye sangano unosanganisira cartilaginous marangwanda uye tsandanyama. Pakati vertebral miviri iri musana Canal vari residual zvimedu embryo musana. Nyaya iyi ndiyo kuzivikanwa dzomunyika mamiriro nehove cartilaginous, uyo kunyange vakura zvishoma vakachengetedzwa Chord. Biology akatsanangura sezvinotevera: panguva embryogenesis notochord zvinowanisa equidistant voga constrictions, umo muitiro ndiye anosarudza calcareous deposits zvivako. Zvishoma nezvishoma vagovane Chord pamusoro mutumbi vertebrae shwashwa, connective zvinyama uye nhengo dzayo kuramba mukati intervertebral discs.

Zvakakurukurwa sechivako hove Sturgeon Series

Pamwe Sharks uye mwaranzi, naye vane zvakawanda zvakafanana, vamiririri boka iri nhengo hove yekare. Nokuti Sturgeon, beluga, stellate mamiriro kunoratidzwa zvakadai zviri sezvo yomukati cartilaginous marangwanda uye notochord. Biology inoti kuti madzitateguru Sturgeon kwakaonekwa Devonian nguva Paleozoic yaitonga. Kubva panguva iyi yakaitwa wavo haana kuchinja zvikuru. Adult siyana vane musana akafuka goko pamusoro connective gobvu zvinyama uye mberi noupenyu. Zvikuru yaoma Chord stellate Sturgeon, Sturgeon nezvimwe Sturgeon mu Russia yava nenguva ichishandiswa zvokudya sechinhu zvekupfakira nokuda pizza uye pai, achihudana vyazigoy.