Mary Allen
Mazira amapangidwa m’mimba mwa amayi ambiri a nyama. Mkati mwa dzira muli kaselo kakang’ono ka dzira. Zimenezi zimachititsa kuti kamwana kamphongo kakaidyetse. Mazira amapezeka mu mbalame ndi zokwawa zambiri, zomwe kale zinkapezekanso mu ma dinosaur. Nsomba zimaikiranso mazira, nyama zotchedwa arthropods, mwachitsanzo, tizilombo, nkhanu, nkhanu ndi mitundu ina yambiri ya nyama.
Dzira limakhala ndi kaselo kakang'ono ka majeremusi. Ili ndi selo limodzi lokha lomwe silingawoneke ndi maso. M’mbali mwake muli chakudya chimene kamwanako kakufunika mpaka kukaswa. Kunja kuli khungu. Mazira oterewa ndi ofewa ngati mphira, ngati mazira a kamba. Mazira a mbalame akadali ndi chigoba cholimba cha laimu kuzungulira khungu.
Ziwalo za dzira la nkhuku lomwe lathyoka ndi losavuta kuzindikira: mbali yachikasu, yolk, ili mkati. Nthawi zina amatchedwanso "yolk". Yolk imakutidwa ndi khungu lopyapyala, lowoneka bwino ngati maswiti. Khungu ili limapindika pamodzi kunja ndikumangirizidwa ku chigoba cha dzira. Mwanjira imeneyo yolk sichigwedezeka mozungulira kwambiri. Yolk imayandama mu dzira loyera. Izi nthawi zina zimatchedwa "mapuloteni". Koma izi sizikudziwika bwino chifukwa mapuloteni ndi chinthu chomwe chimapezekanso mu nyama, mwachitsanzo.
Pakhungu la yolk, mutha kuwona bwino diski yoyera ya majeremusi. Muyenera kutembenuza yolk mosamala. Mwana wankhuku amakula kuchokera pa embryonic disc. Yolk ndi dzira loyera ndi chakudya chake mpaka kuswa.
Amayi anyama amayikira mazira atakhwima. Nyama zina zimaikira mazira m’chisa monga mmene mbalame zambiri zimachitira. Mayi nthawi zambiri amaika mazirawo, nthawi zina amasinthana ndi abambo. Nyama zina zimaikira mazira kwinakwake kenako n’kuwasiya. Mwachitsanzo, akamba amakwirira mazira awo mumchenga. Dzuwa ndiye limapereka kutentha koyenera.
Nyama zoyamwitsa zilibe mazira. Amakhala ndi dzira limodzi lokha kapena cell cell. Ndi selo limodzi, laling'ono komanso losawoneka ndi maso. Kwa akazi, dzira limakhwima pafupifupi kamodzi pamwezi. Ngati wagonana ndi mwamuna nthawi imeneyi, mwana akhoza kukula. Mwanayo amadya chakudya chimene chili m’magazi a mayi ake.
Kodi anthu amadya mazira otani?
Mazira ambiri amene timadya amachokera ku nkhuku. Mazira ena a mbalame, mwachitsanzo, ndi abakha. Nthawi zambiri mbalamezi zimakhala m’mafamu akuluakulu, kumene zimakhala ndi malo ochepa ndipo sizimatha kutuluka. Anapiye aamuna amaphedwa nthawi yomweyo chifukwa sangayikire mazira. Odya nyama amaganiza kuti izi ndi zoipa choncho samadya mazira.
Anthu ena amakonda mazira a nsomba. Chodziwika bwino kwambiri chimatchedwa caviar ndipo chimachokera ku sturgeon. Kuti atole mazirawa, munthu ayenera kudula kalulu. Ndicho chifukwa chake caviar ndi yokwera mtengo kwambiri.
Mwachitsanzo, anthu amadya mazira owiritsa pa kadzutsa. Mu poto, mumapanga mazira okazinga kapena mazira okazinga. Komabe, nthawi zambiri timadya mazira osawawona: m'mafakitale akuluakulu, yolk ya dzira ndi albumen zimakonzedwa kuti zikhale chakudya.