Yaya ci gaba da amfrayo na mutum?
Dukkan lokacin da ake ci gaba da haifuwa ta jikin mahaifa ya zama kashi kashi 4. Bari muyi magana game da kowane ɗayan su dabam.
Mataki na farko shine gajeren lokaci kuma yana nuna fuska da kwayoyin kwayar cutar, wanda zai haifar da zygote.
Saboda haka, a ƙarshen rana ta farko daga lokacin haɗuwa da jima'i na jima'i, mataki na biyu na ci gaba zai fara - murkushewa. Wannan tsari ya fara kai tsaye a cikin shafukan fallopian kuma yana da kwanaki 3-4. A wannan lokaci, amfrayo na gaba zai cigaba da yaduwa. Ya kamata a lura cewa rabuwa na mutum ya cika kuma abin da zai haifar dashi, ya haifar da fashewa - wani tsari na abubuwa na mutum, blastomeres.
Mataki na uku , gastrulation, yana nuna raguwa, lokacin da aka kafa gastrula. A cikin wannan matsala ta ƙunshi 2 matakai: kafawar juna biyu na embryo, wanda ya ƙunshi ectoderm da endoderm; tare da kara ci gaba, 3 leaf embryonic - mesoderm - an kafa. Matakan da yake samuwa ta hanyar abin da ake kira invagination, wanda aka sanya jigilar kamuwa da jini a daya daga cikin kwakwalwan cikin ciki. A sakamakon haka, an kafa rami, wanda ake kira gastrocole.
Matsayi na hudu na ci gaba na amfrayo, bisa ga teburin da ke ƙasa, ita ce kawar da manyan ginshiƙai na gabobin jiki da kyallen takarda (asganogenesis), da kuma ci gaban su.
Yaya aka samo asali a jikin mutum?
Kamar yadda aka sani, kimanin a ranar 7th daga lokacin haɗuwa, an fara tayi amfrayo cikin cikin mucous Layer na mahaifa. Wannan shi ne saboda sakin kayan haɓakaccen enzymatic. An kira wannan tsari mai gina jiki. Yana tare da shi cewa gestation fara - lokacin da ciki. Hakika, ba koyaushe bayan hadi ya zo ciki.
Bayan shigarwa a cikin bango na mahaifa, adadin da ke ciki na amfrayo zai fara kira na hormone - gonadotropin chorionic. A gaskiya, ƙaddamarwarsa, tashi, ya ba ka damar sanin wata mace cewa za ta zama uwar.
A makon makon 2, an kafa haɗin tsakanin ƙarancin tayin da tasoshin mahaifiyar jiki. A sakamakon haka, samar da karamin kwayar halitta fara sannu a hankali da za'ayi ta hanyar jinin mahaifiyar. Hanyar samar da irin wadannan muhimman abubuwa kamar yadda yarinya da mahaifa suka fara.
Kimanin kwanaki 21, amfrayo ya riga ya kafa zuciya, wanda zai fara aiwatar da takunkumin farko.
Da makon 4 na gestation, lokacin da kake nazarin amfrayo tare da duban dan tayi, zai yiwu a rarrabe idanuwan ido, kazalika da ginshiƙan kwanakin kafa na gaba da alkalami. Harshen amfrayo yana da kama da nauyin, wanda yake kewaye da ƙananan ruwa mai amniotic.
A makon 5, sassan jikin fuskar goshin ta fara farawa: hanci da lebe na sama suna bayyane.
Ta mako 6, gland shine ƙuƙwalwar yourmus, wanda shine babban mahimman kwayar tsarin tsarin kwayoyin halitta.
A mako 7, tsarin zuciya a cikin amfrayo yana inganta: samin sifa, manyan jini. Gudun bile suna fitowa cikin hanta, gland of endocrine tsarin ci gaba.
Hakan na takwas na lokacin jima'i na ci gaba a cikin tebur yana nuna ƙarshen alamomin alamomin ginshiƙai na jikin amfrayo. A wannan lokaci, karuwar girma na gabobin jiki na waje an kiyaye shi, sakamakon abin da amfrayo ya zama kamar ɗan ƙarami. A lokaci guda, yana yiwuwa a rarrabe bayyanannen alamun jima'i.
Menene ci gaba na amfrayo na post-embryonic?
Tsryonic da postembryonic ci gaba - 2 daban-daban lokuta a ci gaban kowane kwayoyin. A karkashin tsari na biyu, yana da kyau a fahimci lokacin lokaci daga haihuwar mutum zuwa mutuwarsa.
Ƙaddamarwa na postembryonic a cikin mutane yana tattare da waɗannan lokuta:
- Yara (kafin tsarin farawa).
- Mature (balagagge, girma girma).
- Lokacin tsufa, yana kawo karshen mutuwa.
Sabili da haka, yana da sauƙin fahimtar irin ci gaban da ake kira ciwon amfrayo, kuma wanda shine postembryonic.