Makon 3 na ciki

Za mu ci gaba tare da mu na musamman «Mako Ciki mako-mako»: bayan sati na 1 y 2, munzo ga hadi. Daya daga cikin kyawawan matakai masu ban sha'awa a cikin dabi'a shine tabbas hadi. Bayan hoton al'ada na haɗin kai tsakanin kwai da maniyyi, za ku so ku san cewa wannan tsari ya ƙunshi matakai masu ban mamaki waɗanda ba a taɓa gaya mana ba a cikin aji, kuma a cikin "Madres Hoy” muna so mu bayyana muku.

Muna cikin wannan rawa mai cike da sinadarai inda kwayoyin halittar jima'i biyu ko gametes zasu musanya chromosomes dinsu, amma ba kafin mu fara tseren mafi kyau da gwaninta ba inda maniyyi daya ya isa kwayar. Abinda zai faru a gaba shine mafi girman asiri da kalubale ga kimiyya, A can inda kananan kwayoyin halitta biyu ke ba da jerin canje-canje don ayyana kadan da kadan abin da muke kira "rayuwa". Muna bayyana muku shi.

Takin takin daki daki

Shin kun san cewa kwan ya wuce mil 0.135 a diamita? Maniyyi ya fi karami, kuma a zahiri, ana iya samun tsakanin maniyyi miliyan 120 zuwa 600 a cikin kowane inzali. Yanzu, amma a cikin su duka, kusan 500 ne kawai zasu isa wannan matakin inda hadi zai gudana.

Bari mu ga kowane nau'i.

Doguwar tafiya ta fara.

Wannan kasada zata fara ne idan aka saka maniyyin a cikin farji. Wannan wurin ba yanayi bane mai dadi, yana da ruwa sosai kuma saboda haka ana tilasta maniyyi ya nemi wani wuri mai alkaline, saboda haka wucewa daga mahaifa zuwa bututun mahaifa a cikin awanni biyu.

Da zarar cikin fallopian tubes, maniyyi na iya rayuwa na awanni 48 zuwa 72. Sabili da haka, hadi na iya faruwa tsakanin kwana biyu ko uku bayan yin jima'i.

A cikin wannan kwas ɗin ne inda yawancin ɓangarorin miliyoyin maniyyin suka ɓace, rage zuwa wasu aan masu sa'a waɗanda za su ratsa cikin membrane.
na kwayayen don ba da damar hadi.

A yayin wannan tafiya, maniyyi ya sami raunin rabin layin kawunansu.. Wannan ya faru ne saboda wata muhimmiyar dalili mai mahimmanci: don haka za'a iya fara jerin halayen halayen sunadarai masu mahimmanci don keta ta cikin kwayayen.

Shiga ciki na rawanin radiated

Don ƙarin fahimtar matakan hadi dDole ne muyi tunanin kwayayen halittu kamar yadda yake a matsayin nau'ikan kwantena wanda za'a kare shi ta hanyoyi daban-daban. Ofaya daga cikinsu, mafi girman waje shine daidai rawanin radiated ko radiated.

Ramin da aka haskaka ya kunshi yadudduka da dama wanda aikinsu shine samar da sunadarai ga kwan.
Maniyyin ya isa nan don fara hadadden ci gaba tsakanin dukkanin kwayoyin halitta. kewaye da wannan tsarin. Suna yin sa albarkacin nau'in enzyme wanda ke basu damar buɗe rami daban-daban. Yana da gwagwarmaya!

Zuwan zona pellucida

Maniyyin ya riga ya wuce ta cikin corona radiata kuma yanzu suna cikin shinge na biyu dole ne su ƙetare. Zasu yi haka ne sakamakon wani nau'in enzyme wanda zai haifar da sauye-sauye a cikin maniyyin kansa, wanda ke haifar da abinda aka sani da aikin wuce gona da iri.

A wannan matakin, ba duk maniyyi ne zai yi hakan ba. Babban burin shine don wani takamaiman nau'in tsari ya bayyana: the filawar acrosomic- Dalilin sa? Mai sauqi qwarai, yi ma'amala da jikin tantanin halitta na kwan. Mataki na karshe ...

Fusion

Kodayake kawai 'yan maniyyi sun isa zona pellucida, wannan yakin rayuwa da halayen enzymatic zai ba da damar sa'a ta kasance tare da ɗaya kawai, wanda a ƙarshe zai iya yin hulɗa tare da membrane plasma na oocyte godiya ga filawar acrosomal. Lokacin da wannan ya faru, ana fara jerin canje-canje masu ban sha'awa:

Membranes sun fara haɗawa ta hanyar canje-canje daban-daban na ionic inda aka toshe mafi ƙarancin maniyyi zuwa oocyte.

Kira ya bayyana hadi mazugi, wanda manufar sa shine a bar kai, tsaka-tsakin yanki da wutsiyar maniyyi su shiga ootopte cytoplasm.

Takin takin ciki yana faruwa lokacin da ƙwayoyin cuta ke fisDukansu kan maniyyin da ya samu damar kwan da kuma kwan ita kanta. Daga nan ne gabaɗaya chromosomes 46 suka haɗu (kowane kwayar jima'i yana bayar da gudummawar 23), don haka yana tsara kyakkyawar kyautar kromosome ta sabon mutum.

Kodayake gaskiya ne cewa rabin bayanan kwayoyin halitta ya dace da uba da mahaifiya, lUnionungiyar ta haifar da halittar wani mutum na musamman kuma wanda ba za'a iya sake bayyanawa ba, wanda a wannan lokacin ake kira zygote kuma cewa bayan watanni tara na canje-canje, haɓaka da abubuwan al'ajabi na ɓoye waɗanda za mu bayyana a cikin labaran da ke gaba, za su ba da hanya ga sabon halitta.

Bidiyo mai zuwa Zai taimaka muku sanin kadan game da mamakin hadi:

Muna gayyatarku da ku kasance cikin fadakarwa don gano mataki na gaba na daukar ciki mataki zuwa mataki ...