UMary Allen
Intshayelelo: I-Curious Case yeZinja kunye neBelly Buttons
Izinja zizilwanyana ezifuywayo ezithandwayo kunye nabalingane, kodwa kukho into enomdla ngayo: abanamaqhosha esisu. Oku kunokubabhida, ngakumbi kwabo baqhele ukubona amaqhosha esisu njengophawu lokuzala nokukhula. Kweli nqaku, siza kuphonononga imfihlakalo yokuba kutheni izinja zingenawo amaqhosha esisu kwaye oku kuthetha ntoni kwimpilo yazo kunye nophuhliso.
Amaqhosha eBelly: Uphawu lokuZalwa kweMammalian kunye noPhuhliso
Amaqhosha e-belly, okanye i-umbilical cords, yinto eqhelekileyo kwizilwanyana ezincancisayo. Zenziwa ngexesha lokukhula komntwana xa i-fetus ifakwe kwi-placenta ngentambo ye-umbilical. Intambo isebenza njengobomi, inika umntwana ongekazalwa ngezondlo kunye neoksijini evela egazini likamama. Emva kokuzalwa, intambo iyasikwa kwaye iqhosha lesisu lihlala njengophawu lokuzalwa kunye nophuhliso lwesilwanyana.
Izinja kunye neNkqubo yazo eyodwa yokuzala
Izinja zinenkqubo yokuzala eyodwa eyenza zahluke kwezinye izilwanyana ezanyisayo. Endaweni yokuba nomjikelezo wokuya exesheni njengabantu kunye nezinye izilwanyana ezininzi, izinja ezizimazi zifumana i-estrus okanye imijikelo yobushushu. Ngeli xesha, inja yemazi iyakwamkela ukukhwelana kwaye inokukhulelwa. Ixesha lokumitha kwezinja limalunga neentsuku ezingama-63, kwaye iinjana zikhula ngaphakathi kwisibeleko sikanina.
Ukuphonononga i-Anatomy yesisu seNja
Isisu senja sinamalungu amaninzi abalulekileyo, kuquka isisu, amathumbu, isibindi kunye nezintso. La malungu asebenza kunye ukuze akwetyise ukutya, afunxe izondlo, akhuphe nenkunkuma. Ngokungafaniyo nabantu, izinja azinaso isihlunu se-diaphragm esahlula isifuba kunye nemingxuma yesisu. Oku kuthetha ukuba amalungu akwisisu senja anokuhamba ngokukhululekileyo kwaye awakhuselekanga kancinci kunasebantwini.
Akukho Nkaba, Akukho Ngxaki: Izinja Zizifumana Njani Izondlo zazo
Izinja azinawo amaqhosha esisu, kodwa zisafumana izondlo kumama wazo ngexesha lokukhula komntwana. Oku kwenzeka nge-placenta, elilungu elikhethekileyo elidibanisa iinjana ezikhulayo kwigazi likamama. Iplacenta ivumela izondlo neoksijini ukuba idlule kumama isiya kumantshontsho, kanye njengenkaba kwezinye izilwanyana ezanyisayo.
Indima yePlacenta kuPhuhliso lweZinja
I-placenta yinxalenye ebalulekileyo yokukhula kwenja. Ayiboneleli kuphela izondlo kunye neoksijini kumantshontsho asakhulayo kodwa inceda nasekususeni inkunkuma kwigazi labo. I<em>placenta ikwavelisa iincindi zamadlala ezilawula ukukhulelwa kukamama nezilungiselela umzimba wakhe ukuba ubeleke.
Imfihlelo Yokuduka Kwenkaba
Izinja azinawo amaqhosha esisu, ngoko ke kunokuba nzima ukuqonda ukuba zizalwa njani. Emva kokuba iinjana zikhule ngaphakathi kwisibeleko sikanina, zizalwa ngomjelo wokuzala. Ukushwabana kukamama kunceda ukutyhala iinjana ziphume esibelekweni zize ziye ehlabathini. Ekubeni kungekho ntambo ye-umbilical, iinjana azinalo iqhosha lesisu.
Ukuthelekisa izinja kwezinye iintlobo ze-Belly Button-Lacking
Izinja azikho kuphela iintlobo ezingenamaqhosha esisu. Ezinye izilwanyana, ezinjengeemarsupial, iintaka nezirhubuluzi nazo azinawo amaqhosha esisu. Oku kungenxa yokuba baneendlela ezahlukeneyo zokuphuhliswa komntwana kunye nokuzalwa okungadingi intambo ye-umbilical.
Imbali yeEvolutionary of Belly Buttons
Amaqhosha e-Belly aye avela kwizigidi zeminyaka njengendlela yokudibanisa usana kunye negazi likamama. Izilwanyana ezanyisayo zokuqala, ezifana ne-monotremes, zazingenazo iintambo okanye amaqhosha esisu. Nangona kunjalo, njengoko izilwanyana ezanyisayo zazivelelayo kwaye zaphuhlisa iinkqubo zokuzala ezintsonkothileyo, intambo yenkaba yaba yinxalenye ebalulekileyo yokukhula komntwana.
Iithiyori malunga nokuba kutheni izinja zingenawo amaqhosha e-Belly
Kukho iingcamango ezininzi malunga nokuba kutheni izinja zingenawo amaqhosha esisu. Abanye abaphandi bakholelwa ukuba oku kubangelwa yinkqubo yabo ekhethekileyo yokuzala, engadingi intambo ye-umbilical. Abanye bacinga ukuba izinja zinokuba namaqhosha esisu ngexesha elithile ngexesha lembali yazo yendaleko, kodwa zalahleka njengoko ziqhelana nendawo yazo.
Iimpembelelo kwiMpilo yeNja kunye noNonophelo
Inyaniso yokuba izinja azinawo amaqhosha esisu ayinayo nayiphi na impembelelo ebalulekileyo kwimpilo yabo kunye nokunyamekela. Nangona kunjalo, kubalulekile ukuba abanini bezilwanyana baqonde inja yabo ekhethekileyo ye-anatomy kunye nenkqubo yokuzala ukuze babonelele ngononophelo olungcono kakhulu.
Isiphelo: Ukutyhila iMfihlakalo yeBelly Button-Less Dogs
Ekugqibeleni, izinja azinawo amaqhosha esisu ngenxa yenkqubo yazo ekhethekileyo yokuzala kunye nokuphuhliswa komntwana. Endaweni yenkaba, badityaniswa negazi likanina nge-placenta. Nangona ukungabikho kweqhosha lesisu kunokuba nomdla kwabanye, akunayo nayiphi na impembelelo ebalulekileyo kwimpilo yenja okanye kukhathalelo. Ngokuqonda i-anatomy kunye nenkqubo yokuzala yezinja, sinokuxabisa ngakumbi iimpawu zabo ezizodwa kwaye sinikeze ngononophelo olungcono kakhulu kubahlobo bethu abanoboya.