Camadas akaturikidzana: dzavo mhando uye STRUCTURAL zvinhu

Camadas akaturikidzana - Kazhinji izwi iri embryology. Ivo kunan'anura fetus muviri akaturikidzana panguva mangwanani padariro embryo kukura. Kazhinji, akaturikidzana ava epithelial zvakasikwa.

Camadas akaturikidzana kuti patsanura zvitatu mhando:

• ectoderm - rokunze layer izvo zvichiri unobereka zita epiblast, kana ganda-tisanzwe rukoko;

• endoderm - romukati rukoko nemasero. Rinogonawo kunzi enteric hypoblast kana glandular papepa;

• munhu pakati rukoko (mesoderm kana mezoblast).

Camadas akaturikidzana (zvichienderana nzvimbo dzavo vanoonekwa ne zvimwe zvaidiwa masero. Saka, chokunze paiva embryo rinoumbwa muchitokisi inopenya uye yakakwirira umo nechivako wayo akafanana columnar epithelium. The jira yomukati inoumbwa kakawanda masero guru kuti vakazadzwa zvakananga mondo maplatelet. vane flattened chitarisiko inoita kuti kwavari somunhu squamous epithelium.

Mesoderm pakutanga danho rine chokurukisa uye stellate masero. Ivo mberi iumbe epithelial rukoko. Zvinofanira akati kuti vaongorori vakawanda vanodavira kuti mesoderm - ndiwo avhareji utachiona akaturikidzana, izvo vasiri akazvimirira Dam masero.

kutanga machira embryo vane chimiro mukaha inotungamirwa, iyo inotaurwa blastodermal vesicle. Pane imwe matanda ayo ari kuenda boka masero, rinozivikanwa sero guru. It tibvunze kuti chikuru muura (endoderm).

Zvinofanira akati kuti miviri dzakasiyana vari aumba kubva embryo akaturikidzana. Saka, tsinga ichibudira kubva ectoderm, ari zvomudumbu chubhu rinotanga kubva endoderm, uye marangwanda, kweropa maitiro kubva mesoderm uye tsandanyama tinobva.

Zvinofanira kucherechedzwa kuti maduramazwi embryo membranes kuumbwa panguva embryogenesis. Vane pfupi, havabatanidzwi paumbwe zvomukati uye tiripo chete panguva embryo kukura. Kirasi neimwe zvipenyu dzinogona kurondwa zvimwe pakugadzirwa uye maumbirwo anoshongwa ose mashoko.

With kukura embryology vakatanga kuona kufanana tuvana yakatanga rakarondedzerwa KM Baer muna 1828. Papera chinguva, Charles Darwin akataura honzeri kufanana tuvana ezvinhu zvipenyu zvose - dzakavapo zvakafanana. Severs Pakataurwawo kuti zvakafanana zviratidzo chokuita shanduka tuvana kuti anowanika kakawanda nokuda anaboly.

Kana kuenzanisa dzinokosha zvokukura pakukura Tuvana mumakirasi siyana uye mhando dzemhuka yakawanikwa zvimwe unhu kuti akabvumira kuzoumba mutemo embryo kufanana. The chikuru zvokudya mutemo uyu kuti utachiona ezvinhu zvipenyu zvakafanana mhando pakutanga mumatanho waro budiriro akafanana chaizvo. Zvadaro, embryo kunoratidzwa zvakawanda nomumwe zvinhu izvo zvinoratidza kuti ndeye kuMudzidzisi genus uye mhuka. Panguva iyoyowo vamiririri utachiona zvakafanana mhando vari kuwedzera aparadzana mumwe, uye akafanana chikuru hakuchisina kuchengetwa.