Chifuwa chachikazi kapena mammary gland ndi chiwalo chimene chimapangitsa mkaka, chomwe chili chofunikira kuti mudyetse mwanayo. Imaikidwa ndi munthu kale pa sabata lachisanu la kukula kwa intrauterine .
Asanafike msinkhu, mkaka wa mkaka umawonjezeka kwambiri, ndipo pakatha msinkhu matenda a mammary amayamba kukula mwamphamvu, mkaka wa mkaka umakula ndi nthambi, lactocyte zimakula, mazira amodzi ndi othandizira a ma glands amakula, mawonekedwe a makululumu ndi kuchuluka kwa chiwerengero, ndipo mabala a amber ndi mapiko amawoneka. Chikulire cha msinkhu chimakula nthawi yobereka mwanayo.
Kodi chifuwa cha mkazi n'chiyani?
Zilonda zam'mimba zimaphimba khungu lofewa. Pakatikati mwa mammary gland ndi nkhono yomwe ili ndi asola, yomwe imakhala ndi zofiira komanso zithukuta.
Mapangidwe a chifuwa chazimayi amaimiridwa ndi mitsempha yodula ndi mazira osiyana siyana, minofu ndi mafuta, kupanga ma lobes.
Cholinga chachikulu cha chifuwa cha alveolus, chomwe ndi mtundu wa vesicle. Mkati mwake muli ndi maselo, ntchito yomwe imapanga mkaka (lactocytes). Magulu a alveoli amathandizidwa ndi mitsempha ndi mitsempha ya magazi. Pakati pa mimba, kuwonjezeka kwa alveoli, kuti ayambe kutulutsa mkaka mwana atabadwa. Mgwirizanowu wa 150-200 alveoli ndi lobule, dziwe la makompyuta 30-80 ndilochepa. Mu chipangizo cha abambo aakazi amagawana magawo 15-20 omwe amachotsa madontho, akuphatikizana ndi kuthetsa mimba. Minofu ya minofu mumasola imayankha kukhwimitsa khungu.
Pakati pa lobes ndi lobules ndi minofu yogwirizana yomwe imapanga mafupa apadera a m'mawere.
Zomwe zimagwira ntchito m'mawere
Maonekedwe ndi kukula kwa mbuzi zimatsimikiziridwa ndi chiŵerengero cha kugwirana, chigoba ndi minofu ya adipose.
Mahomoni ndi zakudya mu mammary gland amaperekedwa kudzera mitsempha. Kutuluka kwa madzi amadzimadzi kumabwera ndi zida zamagulu ndi zowopsa. Kulowera mwazi kwa bere kumawonjezeka pa nthawi ya mimba, kusamba, kugonana.
Mapangidwe a chifuwa chachikazi amasiyana malinga ndi msinkhu wa mkazi, gawo la kayendetsedwe ka kayendedwe kameneka, chikhalidwe cha mahomoni , msinkhu wa chitukuko cha kubereka, nthawi ya mimba komanso, lachidziwitso. Asanayambe mapepala a minofu pamwezi, chifuwacho chimakhala chotupa ndi kutupa.
Pa zaka 20-25, chifuwa chokhala ndi chikhalidwe chofanana ndi chigawo cha premammary sichichepera 5mm. Zaka 25-40 - nthawi ya ntchito yogwira ntchito. Mazira amatha kuika epithelium, pamakoma a mammary gland amaoneka nthambi ndi secretory vesicles. Panthawi imene mayiyo amayamba kusamba, minofu yonyansa imatayika. Pokhala ndi zaka, chiwerengero cha parenchyma chochepa chimachepa, chiwonongeko cha minofu yofiira imapezeka. Panthawi yomwe amapezeka m'mimba, minofu yambiri imakhala m'malo mwa mafuta.