Mukadzi wechikadzi masero

Sero rekuberekwa kwevakadzi, rinonzi mazai, chinhu chiduku chakaumbwa, chakashandiswa pakuparadzirwa kweuniform ye vitelline inclusions. Kunze, chikadzi chekubereka vana, iro rimwe geteti, rakafukidzwa neganda rakajeka uye rakakomberedzwa nechepakati remasero epilicular anoita chikafu chekudya. Mukuwedzera, ivo vanoitawo basa rehupenyu hwechigadziro, naizvozvo vanowanzoita basa rinodzivirira.

Ndezvipi zviratidzo zvekugadzirwa kwevakadzikadzi zvepabonde masero?

Ivha, inopinda mumutambo wekufambira mberi, inonzi oocyte. Zvose zvepabonde masero zvakakamurwa ne meiosis. Izvo zvinofanira kuonekwa kuti pamutambo wekupesana mumasero epabonde mune zvimwe zvikamu. Saka kunyanya pamatanho ekutanga ekuparadzanisa egg inononoka mukugadzirwa, asi ichiwedzera muhukuru.

Madzimai, kunyange pamusana wekugadzira intrauterine, kubva kuOogonia - primary sex cells, mamiriyoni eoocytes akaumbwa. Zvakakosha kuziva kuti kwenguva yakati vasati vasvika kuberekwa kwevasikana oocytes kunoshandurwa kuva follicles, i.e. pedo navo inoumbwa iyo shell, iyo yakataurwa pamusoro apa.

Zvose zvinokura mapenzi zvinoramba zvichikura uye pamagumo zvinopera simba kana kusunungura maoocyte ari mukati mavo. Iko kunofanira kuonekwa kuti mumunhu kunatswa kwe oocyte kunowanikwa chete nekutanga kwekuyaruka. Nokudaro, zvinogona kutaurwa kuti masero ekuberekwa kwevakadzi anowedzera mumapapiro emazinga, kana kuti pane mapenzi.

Ndezvipi zviratidzo zvekugadzirisa hutachiona hwemadzimai ezvirwere zvepabonde?

Panguva yekutsvaga, hutori hukuru hunotarisana ne meiosis, hunoita pakuumbwa kweyocyte yechipiri, iyo inopfuura kudarika imwe yapfuura muhukuru. Muchiitiko ichi, sero iri rine haploid, i.e. imwe hafu yechromosomal material, neine yolk yakawanda kupfuura ye oocyte inokosha.

Mushure mokunge musimudziro wemadzimai ezvirume zvepabonde apera, chidimbu, icho chiri pasi pechikamu chepachivande epithelium cheglandeni pachako, chivharo, chinoputsika. Mushure meizvozvo, maoocyte yechipiri anobva aenda mukati mechidziro chemuviri (iyo ovulatory process), kubva pane iyo inotorwa ne cilia iri pamatope, inopinda mumarara.

Ndezvipi zvinonyanya kushanda zvevakadzikadzi zvepabonde masero?

Sezvo uchitaura nezita revakadzikadzi rekuita zvepabonde, takati taongorora chimiro chayo, zvakakosha kutaura pamusoro pekurehwa kwayo. Saka, pakati pebasa re mazai, zvinofanira kutumidzwa kuti:

• kubereka - fetus inoumbwa kubva paiyo yakabereka;
• kuchengetedza uye kutumidzwa kwemashoko ezvemagetsi.