Kusukela ezikhathini zasendulo, isifuba sezinsikazi selubhekwe njengento eveza ukuzala nokubeletha, futhi lokhu kuyinto ecacile ngokucacile, okubangelwa injongo eyinhloko yomzimba - ukukhiqizwa ubisi nokusondeza umntwana osanda kuzalwa.
Ukuqaphela ikakhulukazi kubhalwa umgogodla we-mammary emphakathini wanamuhla, kodwa hhayi kuphela ekubukeni komsebenzi wayo oyisisekelo, kodwa futhi ngokuphathelene nokubona kwezinto zokucabangela nokuphila ngokocansi. Isici sokugcina sokwenyuka kwesithakazelo kubantu bobulili obuhlukile, sizophuthelwa, futhi sikhulume ngezici zesakhiwo sebele kwabesifazane nemisebenzi yayo.
Ukwakhiwa kwesifuba
I-mammary gland ingenye yezitho ezihlanganyelwe zesistimu yokuzala abesifazane futhi ingenye yezici zobulili zesibini. Isidumbu sitholakala ngaphambili kwesifuba esifundeni sezintambo zesithathu nesikhombisa. Ukuma nokulingana kwalo kubaluleke kakhulu kumuntu ngamunye wesifazane, noma kunjalo, isakhiwo sangaphakathi nesakhelo sesifuba sinye esifanayo kubo bonke, kuhlanganise namadoda.
Ingxenye eyinhloko yomsebenzi wesakhiwo sebele yowesifazane yi-alveolus, ephethe ngokuqondile ukukhiqizwa ubisi. Ekubukeka kwayo, i-alveolus ifana ne-vesicle yangaphakathi ehlanganiswe nama-lactocyte - amangqamuzana angama-glandular, angaphandle azungezwe imithwalo yegazi kanye nezinzwa ezinikezelayo.
Ukuqoqwa kwama-alveoli ku-30 kuya ku-80 izicucu zakha ama-lobules, aphinde akha futhi awenze ama-lobes. Njengomthetho, kunezingxenye ezingaba ngu-20 esakhiweni sesifuba sesifazane, esiseduze ne-ingono. Izendlalelo ezincane zezicubu ezixhumeneyo zinikezwa phakathi kwe-lobes nezigaba. Isabelo ngasinye sinezimboni zayo zokungenisa, ezinye zazo zihlangene zibe munye bese zijoyina ngqo i-pore yobisi ekhoneni.
Ingono iyinhlangano encane encane, eyayizungezwe i-areola enezicathulo ezingamamitha amahlanu. Lezi zincenye zesifuba zithuthukise ukuguqulwa kwesikhumba. Ingxube inendima ebalulekile ekukhuliseni ingane.
Ngokwebunjwa nobukhulu be-mammary gland gland yisilinganiso sezinto ezixhumene nezicubu, ezikhona futhi ezakhiweni zayo. Lezi zilinganiso ziyahlukahluka, ngakho-ke kuye ngezici eziningi, ukubukeka kwesifuba kungashintsha. Imingcele ingaxhomeka kuneminyaka yobudala, imvelaphi ye-hormonal, umzimba, inani lokuzalwa kwangaphambilini kanye nokukhulelwa, nesikhathi sokudla.
Izici zokuthuthukiswa kwebele
Uqinisile ukuthi ukubeka isitho kwenzeka ekuthuthukisweni kwe- intrauterine . Ekuqaleni, uhlobo lwesakhiwo sebele lubonakala kokubili amadoda nabesifazane. Kodwa-ke, mayelana nokulawulwa okuphelele kwazo zonke izinqubo ezenzeka ebileni nama-hormone, ukukhula kwawo emgodini oqinile kuvinjelwe, futhi emantombazaneni, emva kokufinyelela eminyakeni ethile, ukuqala okusebenzayo kuqala. Ngokuqondile, i-mammary gland kubantu besifazane iqala ukuthuthukisa ngamandla ngesikhathi sokukhulelwa:
- kukhona i-branching yamathanga ebisi;
- ama-lactocyte athuthuka;
- inani lama-lobules ne-lobes landa;
- izicubu ezixhumeneyo kanye namafutha asondeza;
- ukuguqulwa kwe-nipple kanye ne-asola kuyanda kakhulu.
Ekuphelelweni kwalesi sikhathi, amabele amantombazane awakhiwe ngokugcwele futhi alungele ukufeza isiphetho sabo.
Ubisi ekukhulelweni
Ngokuvamile, izinguquko ezenzeka esifubeni, okokuqala zikwazise umama esikhathini esizayo ngesimo sakhe esithakazelisayo. Lokhu kubangelwa ukuzwela okukhulu kwe-gland mammary kuya izinguquko ezincane emlandweni we-hormonal, empeleni okudala indlela yokulungiselela ukhiqizwa ubisi.
I-mammary gland iyisici esiyinkimbinkimbi yesistimu yokuzala, enesakhiwo esiyingqayizivele, ivumela bonke abesifazane ukuba banakekele zonke izinguquko ezenzeka kuyo.