The jakar kwai a lokacin daukar ciki

Mutane da yawa mata bayan duban dan tayi sha'awar wannan tambaya: "Abin da yake kuma jakar kwai a lokacin daukar ciki, da kuma abin da yake da shi ga?". Dauki wani amfani a duk abin da ko ta wani hanya yana yi tare da tayin - wannan shi ne al'ada. To, a yau, bari mu magana game da abin da yake cikin jakar kwai a lokacin daukar ciki, da kuma abin da ayyuka shi aikin.

Saboda haka, a karkashin jakar kwai ake nufi wucin gadi sashin jiki na mutum amfrayo. A wasu kalmomin, da kuma jakar kwai a lokacin daukar ciki - shi ne m wanin Extended rabo daga primary ciwon daji, wanda waje ne da mutum tayin da kuma shi ne alhakin da farko jini ya kwarara da kuma sarrafa farko jam sel.

Samuwar jakar kwai a lokacin daukar ciki dogara ne a kan endoblasticheskogo kumfa a lokacin placentation a cikin 15-16 rana na oocyte maturation.

The jakar kwai a lokacin daukar ciki: ganawa

A farkon makonni na ciki (na farko ko na biyu trimester) da kuma jakar kwai girma ƙetare girma na germinal Disc da amniotic kogo. Tun lokacin da na uku trimester a cikin jakar kwai kafa kafa capillary cibiyar sadarwa da bayar da makaman nukiliya foci eritortsity erythropoiesis.

A general shi za a iya lura da cewa ga wani mutum jakar kwai amfrayo a ciki yana da muhimmanci sosai, tun lokacin da ya ke cikin provisory jiki aiki a matsayin abin da ake kira "primary hanta", da wanda masu tasowa tayi na'am da muhimmanci sunadaran kamar alpha 2-microglobulin, alpha fetoprotein, da dai sauransu

Bayan 28-29 kwanaki bayan hadi, kwai da kuma jakar kwai a lokacin daukar ciki zama kai tsaye tushen jam sel daga shiga yankin na ganuwar ta zuwa alamomin gonad amfrayo. Kamar yadda na farko trimester ya zo ga ƙarshe, da kuma jakar kwai ne kammala aiki kuma ya jũya zuwa wani karamin cystic samuwar kusa da tushe daga cikin cibiyarki igiyar.

Yana da muhimmanci cewa rage daga cikin jakar kwai a lokacin daukar ciki bai faru kafin lokaci, sai daidai lokacin da tayi gabobin suna kafa gaba daya. In ba haka ba makawa ashara ko rasa zubar da ciki.

Mene ne samuwar jini a cikin jakar kwai?

A farkon mako guda uku fara aiwatar da hematopoiesis, wanda aka halin kadaici da rudiments na Sistem jini abun ciki na primary hematopoietic Kwayoyin tare da manyan nucleoli a tsakiya da kuma basophilic cytoplasm. hematopoiesis tsari ne kare da karshen na huɗu mako mutum tayi ci gaba da kuma sa'an nan fitowa hematopoiesis a amfrayo nama.

A gaskiya, a yau rarrabe tsakanin biyu Concepts na zargin hematopoietic Kwayoyin a cikin mutum amfrayo. Modern embryologists da hematologists rare theories bi zuwa endothelial asalin kuma vnutriembrionalnogo mesenchymal asalin. Duk da haka, mafi kuma mafi masana suna karkata zuwa sa a gaba, kuma a cikin karni na karshe manufar cell hijirarsa daga cikin jakar a cikin fetal nama, wadda za ta zama a matsayin hujja daga cikin gwaje-gwajen da suka shafi cikin namo linzamin kwamfuta gudan jini. A cikin kyallen takarda amfrayo al'adun bayan wata gajeruwar rashin daga jakar kwai Kwayoyin ne gaba daya ba a nan kafin hematopoiesis. A lokaci guda, da kuma jakar kwai, wanda aka horar da ba tare da tayi, shi ne mai arziki a cikin irin wannan Kwayoyin, wanda sake tabbatar da jari a ƙarshe na hijirarsa a cikin tayi nama.

Duk da haka, shi ya kamata a fahimci cewa irin wannan wani gwaji model ba zai iya zama dalilin wani tabbataccen karshe game da kafa hematopoiesis a mutum amfrayo. Wadannan gwaje-gwajen - wani sabon zarafi ga kyakkyawar fahimtar da embryogenesis a cikin mutane a farkon matakai, kuma ba more.