Embryonic Breast Development - Conception kusvika 12 Mavhiki
Kubudirira kwebonde kunotanga panguva yevhiki yechina yekugadzirisa nekukura kwemashoko makuru emukaka. Misi yemira, kana kuti "ventral epidermal ridges," inoonekwa nevhiki yechitanhatu ye "hupenyu" hwembryo. Vanodonha kubva pasi kumapapiro kuenda kunogomera kumativi ose. Chifuva chinokura parutivi rwechikwata chiri pamusoro pechifuva, uye zvakasara zvegomba, kakawanda, zvinoparadzaniswa.
Embryonic Breast Development - 12 kusvika 40 Mavhiki
Pakati pemasvondo gumi nemana makumi maviri nematanhatu, girasi, mamwe masero anoshandura anoramba achiwedzera kusvika mumutsipa unotapira wemukono uye isola. Parizvino, mammary buds inoumba uye inoita mazai emukaka kubva kumasero ari pedyo pamwe chete. Hondoni dzepabonde mumumakumbo dzinopinda mumusana we fetal uye dzinodzora kukura kwezamu; izvi zvinosara kusvikira vhiki makumi maviri nemaviri masikati. Zvadaro, kubva pamasvondo makumi maviri nemaviri kusvika makumi mana, mazamu emukaka, ane mavara, maitiro mukati memukono.
Embyronic Breast Development - Mavhiki makumi mana ekuberekwa
Mumavhiki ekupedzisira ekudzivirira, fetal mammary gland ukuru hunokura kanomwe kupfuura hukuru hwaro hwepakutanga, uye mbungu uye isola inokura zvakanyanya uye inosviba. Pakuberekwa, zvikamu bedzi zviripo zvehutachiona hwemazamu ndiwo mukaka ducts mukati memukomana - the alveoli, kana makisi-anobudisa masero-asina kuumbwa uye kwete kuchinja kukuru kuchaitika ikozvino kusvikira kutanga kwekuyaruka.
Mushure mokuberekwa, mishonga yemucheche inoberekwa inogona kuvhara colostrum.
Kuchinja Kwebonde Panguva Yokupera
Estrogen, iyo hormone inotanga kuyaruka muvasikana, inokonzera kuchinja kwechate. Kukura kwebonde kunowanzoitika nekuda kwekuwandisa kwemafuta akawanda. Nzira iyi inowedzera uye inopararira, uye mapoka mashoma, masero mashoma anoumba padhara yekuguma.
Izvi ndezveramangwana. Ivhareji yekukurumidza mazamu inowanikwa pakati pemakore 10 kusvika ku11, zvisinei nokuti hutano hwakanaka huri pakati pemakore 8 kusvika ku13.
Kuchinja Kwebonde Panguva Yokuenda Kumwedzi
Panguva yekuenda kwemwedzi mumwe nomumwe, kusimwa uye kukura kwakasimba kwezvikwata zvechikwata zvinowanzoitika panguva yemapapuriro eupollicular and ovulatory, ayo anowedzera mumakore ekupedzisira echikwata uye anowedzera. Pakati pega yega, kuwedzera kweivarian steroids, kunyanya progesterone, kukurudzira huwandu hwemammary hunozodzokera kune zvaive huri mumakore ekutanga. Zvose zvakagadziriswa zvemamota zvinoshanda chete panguva yekuzvitakura.
Breast Tissue Composition
Chifuva chinoumbwa nemhando mitatu yemaviri: glandular, fibrous (kusanganisira mitsetse inosungirirwa ) uye adipose (kana mafuta) tissue. Izvo zviyero zvakaenzana zvehupenzi, fibrous, uye adipose mhuka dzinochinja nekukwegura, kuenda kumwedzi, pamuviri, uye mamiriro ekudya.
Chirwere chechikuru cheAnatomy
Mukati mazamu mazamu akaoma, zvivako zvakakosha zviripo. Izvi zvinosanganisira:
- alveoli , kana zviduku zviduku mumukaka zvakachengetwa uye zvakavanzwa
- myoepithelial cells , iyo inopoteredza alveoli uye chibvumirano kuitira kuti mukaka uomanikidzwe kunze mumucheka wemukaka
- ducts uye marukisi , izvo zvinosvina mukaka kubva kune alveoli
- zvivi zvakasvibiswa , kana kukwidziridzwa kwemakumbo pasi pemasola anochengetedza mukaka
- lobes , kana branching network yezvose zvataurwa pamusoro apa; imwe yepamu inenge inenge 20, inopera mukoyi.
Zvimwe Zvikamu Zvikuru Zvebonde
- Cooper's ligaments
- Axillary muswe , kana chikamu chemukoko wemumvuri unoenderera mukati memakumbo
- Ropa , iro rinobva kune dzimwe mammary arteries
- Musculature
- Inotora , kana nerve yekupa
- Lymph ekugovera uye kunyura : midziyo yeLymphatic inotakura ichi chinokonzera mvura inobuda ropa neropa mvura. Lymfu inobviswa kubva kumamota gland uye maikisi akaipoteredza nemasumbu maviri emidziyo ye lymphatic - imwe ndeyeganda; imwe yacho ndeyomuzamu chaiyo, mbungu uye isola.
Kuonekwa kwepabonde
Mazamu anosiyana kubva kumukadzi kuenda kumukadzi. Nhengo dzezamu dzinozivikanwa neziso risina kusimba dzakasiyana-siyana; tsanga yemukono uye chimiro; maruva ariolar, ukuru uye maumbirwo, uye Glands yeMontgomery (zviduku zviduku zvishoma pamasola anovhara mafuta chaiwo kuti agadzire nzvimbo yacho uye anobatsira kudzivirira mabhakitiriya kubva mukubereka.)