Tun zamanin d ¯ a, an dauki nauyin nono a matsayin alamar haihuwa da haihuwa, kuma wannan abu ne mai cikakken bayani, wanda shine ainihin manufar jiki - samar da madara da kuma ciyar da jariri.
Ana kulawa da hankali ga nauyin gwiwar mammary a cikin zamani, amma ba kawai daga ra'ayi na aikinsa ba, amma har ma dangane da hangen nesa da kuma jima'i. Hanya na ƙarshe na karuwar sha'awa ga mutanen da ba jima'i ba, za mu yi kuskure, kuma muyi magana game da siffofin tsarin nono a cikin mata da ayyuka.
Tsarin ƙirjin
Glanden mammary yana daya daga cikin ɓangarorin da aka haifa na tsarin haihuwa na mace kuma yana daya daga cikin siffofin jima'i na biyu. Ginin yana tsaye a gaban kirji a yankin na uku da na bakwai ribs. Halinsa da girmansa sune cikakkiyar mutum ga kowane mace, duk da haka, yanayin ciki da tarihin ƙirjin yana daidai da kowa, ciki har da maza.
Babban sashi na aikin jiki na mace shine alveolus, wanda ke da alhakin samar da madara. A cikin bayyanarsa, alveolus yana kama da wani nau'i mai ciki wanda aka layi da lactocytes - glandular Kwayoyin, a waje yana kewaye da jini da jijiyoyin da ke samar da ita.
Haɗuwa da alveoli a cikin adadin 30 zuwa 80 nau'i suna samar da lobules, wanda kuma ya samar da lobes. A matsayinka na mai mulkin, akwai kimanin kashi 20 a cikin tsarin mace, wanda ke kusa da kan nono. Ana bayar da nau'i mai nau'i na kayan haɗin kai tsakanin lobes da sassan. Kowane ɓangaren yana da tashar sarrafawa, wasu daga cikinsu sun haɗa zuwa ɗaya kuma suna kai tsaye a kai tsaye ga madara mai madara a cikin nono.
Kan nono ne ƙirar ƙirar ƙananan ƙira, kewaye da isola da diamita na har zuwa biyar centimeters. Wadannan sassa na nono sun inganta karfin fata. Ƙunƙarar tana da muhimmiyar rawa a cikin tsarin ciyar da jariri.
Domin siffar da girman mace ta mammary gland shine nauyin haɗin kai da kuma adipose, wanda kuma yake cikin tsarinsa. Wadannan samfurori suna da mahimmanci, saboda haka yana dogara da dalilai masu yawa, bayyanar ƙirjin shine batun canjawa. Sigogi zasu iya dogara da shekarun da suka wuce, halayen hormonal, jiki, adadin haihuwa da ciki, da kuma tsawon lokacin ciyarwa.
Fasali na ci gaba da nono
Ya kafa gaskiyar cewa kafa wani kwayoyin halitta yana faruwa ne a cikin tsarin ci gaban intrauterine . Da farko, irin tsari na nono ya kasance daidai ga maza da mata. Duk da haka, dangane da cikakken tsari na dukkanin matakan da ke faruwa a cikin nono tare da kwayoyin hormones, ana cigaba da girma a cikin rabi mai karfi, kuma a cikin 'yan mata, bayan sun kai wani zamani, ci gaban aiki ya fara. Fiye da haka, glandar mammary a cikin mata ta fara farawa sosai a lokacin balaga:
- akwai ragowar madauran madara;
- lactocytes ci gaba;
- yawan lobules da lobes yana ƙaruwa;
- kayan haɗin kai da mai ɗumbin kuɗi;
- da alarin daji da kuma isola ya kara fadada.
A ƙarshen wannan lokacin, ƙirjin yarinyar ya cika sosai kuma yana shirye ya cika makomarsu.
Tema a ciki
Sau da yawa, canje-canje da ke faruwa a cikin kirji, da farko sanar da mahaifiyar nan gaba game da yanayin da take sha'awa. Wannan shi ne saboda girman halayen glandar mammary zuwa ƙananan canje-canje a cikin bayanan hormonal, wanda ke haifar da ingancin shirye shiryen samar da madara.
Glanden mammary shine kwayar halitta ta tsarin haihuwa, yana da nau'i nau'i daban-daban, ya tilasta kowace mace ta kula da dukan canje-canje da ke faruwa a ciki.